How to Review a Portable Earthing Set Drawing Before Production: Buyer Approval Checklist
A portable earthing set should not enter production only because the purchase order has been issued.
For custom or project-based portable earthing and short-circuiting equipment, the supplier normally needs to convert the approved RFQ, technical schedule, connection-point information, cable arrangement, clamps, and fault-duty requirement into a controlled assembly drawing.
That drawing becomes an important pre-production control document.
For utility buyers, EPC contractors, consultants, and technical procurement teams, the main review question is not:
Does the drawing look complete?
より重要な問いは次のとおりです。
Does the proposed production drawing accurately represent the approved project requirement, and is the configuration supported by the required technical evidence?
The key approval chain is:
Approved RFQ → Supplier Drawing → Technical Review → Comments → Revised Drawing → Approval → Release for Production → FAT
The purpose of drawing approval is to identify configuration errors before manufacturing begins.
現地の規制および現場の安全手順に従ってください。
Quick Answer: What Must Be Approved Before Manufacturing?
Before releasing a portable earthing set for production, buyers should confirm:
- 図面番号とリビジョン
- Correct project and PO reference
- Approved connection topology
- Number of phase and earth leads
- Individual cable cross-sections
- 個々のケーブルの長さ
- Phase clamp models and interfaces
- Earth clamp model and interface
- フェルールと終端部
- Connecting cluster or common point
- Operating pole and adapters
- Fault-current duty reference
- Compatibility with supporting test evidence
- BOMの一貫性
- マーキングとトレーサビリティ
- Declared technical deviations
- Closed review comments
- Final production-release status
A strong drawing-review process follows:
Specification → Configuration → Interfaces → Evidence → Revision Control → Approval
The drawing should translate an approved procurement requirement into a manufacturable assembly.
It should not silently rewrite the requirement.
For the upstream specification stage, see 入札で携帯型接地キットを指定する方法.
Why the Production Drawing Is a Control Document
A portable earthing set may contain:
- 位相クランプ
- アースクランプ
- フレキシブル導体
- 位相リード
- 地球の鉛
- フェルール
- 接続中のクラスター
- 共通接続点
- アダプター
- 絶縁操作ポール
- 収納アクセサリー
These components work as one system.
The drawing should therefore do more than show the product shape.
It should define the approved configuration.
A controlled production drawing helps connect:
購入者の要件
〜へ
Supplier proposal
〜へ
製造業
〜へ
FAT
〜へ
配達された製品
If that link is weak, problems often appear later as:
- Wrong cable lengths
- Wrong clamp models
- Incorrect topology
- 付属品が不足している
- Unsupported substitutions
- BOM differences
- Fault-duty evidence that applies to another configuration
These issues are much easier to correct before production.
Step 1: Confirm Drawing Number, Revision, and Project Reference
Before reviewing the technical details, confirm that you are reviewing the correct document.
チェック：
- Drawing title
- 図面番号
- 改訂番号
- 改訂日
- Customer
- プロジェクト
- 注文書
- Tender or contract reference
- サプライヤーモデル
- 商品番号
- Prepared-by information
- Checked-by information
- 承認ステータス
This seems simple, but revision control is one of the most important parts of pre-production approval.
具体的な例を挙げますと、以下の通りです。
Revision A
- 50 mm²ケーブル
- 1.5 m phase leads
- 3 m earth lead
- Clamp model A
Revision B
- 70 mm²ケーブル
- 2 m phase leads
- 5 m earth lead
- Clamp model B
If the project approved Revision B but production uses Revision A, the final product can be wrong even though both drawings look technically complete.
Check the revision before checking the components.
Do not release production from an uncontrolled screenshot, quotation attachment, or old email drawing when the project requires formal document control.
Step 2: Compare the Drawing With the Approved RFQ
The next step is to compare the supplier drawing with the approved procurement requirement.
Review the major engineering inputs:
- 用途
- 交流または直流システム
- システムコンテキスト
- 承認済み故障電流定格
- 定格時間
- Peak-current requirement where applicable
- 相数
- アース配置
- 接続ポイント
- ケーブル断面
- ケーブルの長さ
- クランプインターフェース
- アース接続
- 動作極の要件
- Accessories
- マーキング
- ドキュメント
The supplier drawing should reflect the accepted technical offer.
It should not introduce new assumptions.
For example, if the RFQ states:
70 mm² flexible copper conductors
the production drawing should not show:
50mm²の
without an approved technical deviation.
Likewise, if the project requires:
flat-busbar phase clamps
the supplier should not replace them with another clamp type without declaring the change.
The supplier drawing should translate the approved specification into a manufacturable assembly, not silently modify the specification.
Step 3: Verify the Connection Topology
“Three-phase portable earthing set” does not define one universal arrangement.
The drawing should clearly show how the complete current path is arranged.
チェック：
- 位相クランプの数
- 位相リードの数
- 相間接続
- 相間接地経路
- 一般的なクラスター
- Individual earth leads
- Common earth lead
- 枝の配置
- 該当する場合は中性線接続
- Earth connection point
A buyer should be able to understand the electrical topology without guessing from the cable count.
例えば、プロジェクトでは以下のような要件が求められる場合があります。
Three phase branches → common cluster → one earth lead
または：
3つの独立した相間接地線
These are different assemblies.
詳細な説明については、以下を参照してください。 携帯型接地装置における相間接続および相対地接続.
During drawing approval, the question is simpler:
Does the supplier drawing show the same topology that the engineer approved?
Step 4: Review Every Cable and Lead Separately
Do not approve the drawing from one general cable statement.
A multi-phase assembly may contain several different lead lengths.
Review each lead separately.
A useful schedule can look like this:
| タ | 導体 | 断面 | 長さ | に | |
|---|---|---|---|---|---|
| フェーズA | 銅 | 70mm²の | プロジェクトの価値 | Phase clamp | クラスタ |
| フェーズB | 銅 | 70mm²の | プロジェクトの価値 | Phase clamp | クラスタ |
| フェーズC | 銅 | 70mm²の | プロジェクトの価値 | Phase clamp | クラスタ |
| 地球の鉛 | 銅 | 70mm²の | プロジェクトの価値 | クラスタ | アースクランプ |
Depending on the project, also confirm:
- ケーブル構造
- Sheath or insulation
- 色圏
- Flexible conductor requirement
- 識別
- 終端タイプ
Avoid one vague drawing note such as:
Cable length: 5 m.
That does not explain whether 5 m refers to:
- Every phase lead
- Total cable length
- 地球の鉛
- XNUMXつのブランチ
- 完全な組み立て
For technical approval, each important lead should be identifiable.
Step 5: Compare Lead Lengths With Site Geometry
Cable length should not be approved from the supplier drawing alone.
Compare the proposed lengths with the actual connection geometry.
Useful engineering inputs include:
- 位相間隔
- バスバー間隔
- 機器幅
- Connection-point position
- 地球上の地点の位置
- 装置の高さ
- キャビネットの深さ
- 承認されたケーブルルート
- アクセス制限
The purpose is not to create a field installation procedure.
その目的は以下の質問に答えることです。
Does the proposed assembly physically fit the approved connection points?
For example, an earth lead that is technically suitable in cross-section may still be unsuitable if the approved earth point is farther away than the proposed cable can reach.
Likewise, excessively long leads may affect:
- 取扱方法
- Storage
- ルーティング
- Assembly geometry
- 技術的証拠
Do not approve cable length from the principle:
Longer is safer.
The required length should come from the approved project geometry.
Step 6: Match Phase and Earth Clamps to the Actual Interfaces
言葉：
ユニバーサルクランプ
are not enough for drawing approval.
Each clamp should be linked to a real connection point.
For phase clamps, review:
- クランプモデル
- 顎のデザイン
- 顎の開き範囲
- Flat or round conductor interface
- バスバーの寸法
- 導体径
- Ball-stud interface where applicable
- 接触面デザイン
- ケーブル接続
- 動作極インターフェース
For the earth clamp, review:
- アースバー
- ロッド
- スタッド
- Fixed terminal
- Structural earth point
- Other approved connection geometry
The drawing or BOM should identify which clamp is used at each location.
A clamp should be approved against an interface, not only against a product name.
A photograph may help explain the site condition, but dimensions are more useful when clamp fit depends on geometry.
Step 7: Review Ferrules, Terminations, and the Connecting Cluster
Cable cross-section is only one part of the current path.
The drawing package should also identify how the flexible conductor connects to:
- Phase clamp
- アースクランプ
- 接続中のクラスター
- 7月
- エンドフィッティング
レビュー：
- Ferrule reference
- Lug reference where applicable
- Cable-to-clamp connection
- Cable-to-cluster connection
- エンドフィッティング
- Strain-relief arrangement where specified
- Component reference
The production drawing does not always need to show every manufacturing detail.
However, the termination should be defined well enough to prevent uncontrolled substitution.
Do not approve the conductor size while leaving the termination undefined.
For detailed termination inspection criteria, see grounding cable terminations: ferrules, lugs, and clamp connections.
Do Not Ignore the Cluster
For clustered multi-phase sets, the common connection point is part of the complete current path.
チェック：
- Cluster model
- 支店数
- ケーブル接続方法
- Earth-lead connection
- Component reference
- Arrangement in the assembly
A cluster is not simply an accessory between several cables.
Its configuration can be relevant to the complete assembly evidence.
Step 8: Compare the Production Drawing With Fault-Duty Evidence
This is one of the most important approval steps.
The drawing may look correct geometrically but still differ from the configuration supported by the supplier’s test evidence.
For portable earthing and short-circuiting equipment, buyers should review:
- 定格電流
- 定格時間
- ピーク電流基準
- ケーブル断面
- ケーブルの長さ
- 位相クランプ
- アースクランプ
- フェルール
- クラスタ
- 枝の配置
- 完全にテストされた構成
The production drawing should be compared with the drawing or configuration referenced by the supporting evidence.
具体的な例を挙げますと、以下の通りです。
テスト済み構成
- 70 mm² conductor
- Clamp A
- Ferrule F1
- クラスターC1
- Defined branch arrangement
Proposed Production Drawing
- 50 mm² conductor
- クランプB
- Ferrule F2
- クラスターC2
- Different lead arrangement
These should not automatically be treated as the same product because both documents show:
25kA。
購入者は以下の点を問うべきである。
Does the available fault-duty evidence actually support the configuration shown on the production drawing?
For a detailed rating review, see 携帯用接地キットの故障電流定格.
Compare Three Technical Configurations Before Approval
A strong review normally connects three different engineering references.
1. Project Requirement
This describes what the site needs.
以下が含まれる場合があります。
- 接続ポイント
- Required topology
- 過失責任
- 距離
- アクセス条件
2. Tested Configuration
This shows what the supplier’s technical evidence actually supports.
It may identify:
- ケーブル
- クランプ
- フェルール
- クラスタ
- リードアレンジメント
- Test duty
3. Proposed Production Drawing
This shows what the factory intends to manufacture.
承認前：
Production Drawing must match the Project Requirement
(NAIST) と
Technical Evidence must support the Production Drawing
After manufacturing, a fourth comparison is added:
4. 完成品
That becomes part of FAT.
This creates a clean evidence chain:
Project requirement → Tested configuration → Approved production drawing → Finished assembly
Step 9: Check the Drawing Against the BOM
Do not review the assembly drawing without the Bill of Materials.
A drawing can be technically correct while the BOM still contains the wrong component.
具体的な例を挙げますと、以下の通りです。
描画
Phase clamp: C-100
GOOD
Phase clamp: C-120
If manufacturing follows the BOM, the finished equipment may not match the approved drawing.
チェック：
- Drawing item number
- BOM item number
- コンポーネント名
- 製品番号
- 数量
- Material where specified
- コンポーネントの改訂
- サプライヤーモデル
Typical BOM items may include:
- 位相クランプ
- アースクランプ
- Phase cables
- アースケーブル
- フェルール
- クラスタ
- アダプター
- 操作ポール
- Pole head
- 収納袋
- ラベル
- Accessories
A correct drawing with an inconsistent BOM can still produce the wrong product.
Both documents should be aligned before production release.
Step 10: Confirm Operating Poles, Adapters, and Accessories
Portable earthing set drawings often focus on cables and clamps.
Do not forget the operating equipment.
If the supply includes an insulating operating pole, confirm:
- ポールタイプ
- Fixed, sectional, or telescopic design
- 必要な作業長さ
- 該当する場合は、長さを縮めて表示します。
- ヘッド形式
- クランプインターフェース
- アダプタ
- 収納袋
- 数量
The most important interface question is:
Does the operating pole actually connect to the selected clamp mechanism?
A correct pole and a correct clamp can still be incompatible if their interfaces differ.
Also confirm other project accessories such as:
- 収納ケース
- Transport bag
- 予備クランプ
- Spare adapters
- ラベル
- 検査タグ
If these are part of the approved supply scope, they should appear in the drawing package or BOM.
Step 11: Define Marking and Traceability Before Production
Do not wait until FAT to decide how the product will be identified.
The approved technical package should define the required marking system.
プロジェクトによっては、以下の内容が含まれる場合があります。
- キットID
- シリアルナンバー
- ケーブル識別
- ケーブル断面
- ケーブル長
- クランプID
- 部品番号
- 顧客資産番号
- バッチ参照
- Rating reference
- プロジェクト名
The identification system should connect:
Physical set → production record → drawing → test evidence → FAT record → delivery documents
For lifecycle control, see 携帯型接地セットの識別とトレーサビリティ.
If markings must appear in specific positions, define them before manufacturing.
これは特に次の場合に便利です:
- 大口注文
- Multiple kit configurations
- Utility projects
- EPC packages
- Projects with component-level traceability
Step 12: Identify Technical Deviations
A supplier drawing should not hide technical deviations.
Suppose the RFQ requires:
70 mm² copper conductor.
The supplier drawing shows:
50mm²。
The buyer should not be expected to discover that difference manually without a deviation statement.
Likewise, deviations may include:
- Different clamp model
- Different conductor material
- Different cable length
- Different topology
- Different ferrule
- Different cluster
- Different operating pole
- Different accessories
- Different marking
- Different supporting evidence
A strong technical submittal separates:
Compliant requirement
from
承認された代替案
from
Technical deviation
Every material technical deviation should be declared, not hidden inside a revised drawing.
This makes approval more transparent and protects both buyer and supplier from later disputes.
Step 13: Control Review Comments and Drawing Revisions
Drawing comments should be traceable.
以下にのみ頼ることは避けてください。
- WhatsAppメッセージ
- Verbal discussions
- Marked screenshots
- Uncontrolled email instructions
For project orders, use a comment register or controlled drawing-markup process.
具体的な例を挙げますと、以下の通りです。
| Review Comment | サプライヤーの対応 | リビジョン | ステータス |
|---|---|---|---|
| Earth lead length does not match approved layout | Revised to project value | Rev.B | 休診⽇ |
| Earth clamp interface unclear | Clamp detail added | Rev.B | 休診⽇ |
| Test report reference missing | Added to technical schedule | Rev.B | 休診⽇ |
| Kit ID location not shown | Marking position added | Rev.C | 休診⽇ |
The purpose is not to create unnecessary paperwork.
It is to make sure:
The factory knows exactly which comments have been incorporated into the production version.
Drawing Approval Status Should Be Clear
Different EPC companies, utilities, and consultants use different approval codes.
A project may use statuses such as:
| ステータスの確認 | 典型的な意味 |
|---|---|
| 承認 | Drawing can proceed under project procedure |
| コメント付きで承認されました | Comments must be incorporated as specified |
| 修正して再提出してください | Production should not proceed from the submitted version |
| 拒否され | Proposed configuration is not accepted |
The exact terminology should follow the contract.
Do not assume every organization uses the same approval code.
重要な点は次のとおりです。
The manufacturing team should be able to tell whether the drawing is formally released for production.
A Purchase Order Is Not Automatically a Drawing Approval
This distinction matters for custom equipment.
A buyer may issue the PO first and complete technical submittal approval afterward.
その場合:
購入注文
必ずしも次のことを意味するわけではありません。
Approved for Production
unless the contract specifically says otherwise.
For project-specific portable earthing equipment, a controlled workflow may be:
PO issued
↓
Supplier drawing submitted
↓
Buyer comments
↓
Revised drawing
↓
技術承認
↓
製品版リリース
This reduces the risk of manufacturing an assembly that later needs to be changed.
When Is a Drawing Ready for Production Release?
Before approving manufacturing, ask:
Is the revision correct?
No open revision conflict.
Does the drawing match the RFQ?
No uncontrolled technical change.
Is the topology correct?
The required current path is clear.
Are all important leads defined?
Cross-section and individual length are shown.
Are clamps matched to real interfaces?
No generic or assumed interface.
Are terminations and cluster defined?
The complete current path is controlled.
Does the evidence support the configuration?
No unexplained gap between tested and offered design.
Does the BOM match the drawing?
No component inconsistency.
Are operating poles and accessories included?
The complete scope is controlled.
Are markings defined?
Traceability can be implemented during manufacturing.
Are all technical deviations approved?
No hidden alternative.
Are review comments closed?
No unresolved technical action.
If these questions cannot be answered, production release may be premature.
Portable Earthing Set Drawing Review Checklist
| Drawing Review Item | 購入者は確認する必要があります |
|---|---|
| 図面番号 | Controlled document number |
| リビジョン | Latest reviewed revision |
| プロジェクト | Correct project/customer |
| PO参照 | 正しい順序 |
| 正しい組み立て | |
| トポロジー | Correct phase-to-phase and earth path |
| ケーブル材料 | Matches approved requirement |
| ケーブル断面 | Correct for each lead |
| 位相進み長さ | Each lead defined |
| 地球の鉛の長さ | Defined separately |
| 位相クランプ | Correct models and interfaces |
| アースクランプ | Correct earth-point interface |
| フェルール | Correct termination reference |
| クラスタ | Correct arrangement |
| 操作ポール | Correct type, length, and interface |
| アダプター | 正確かつ完全 |
| Accessories | Complete approved scope |
| 過失責任 | Approved current/time/peak reference |
| テスト証拠 | Supports proposed configuration |
| GOOD | Matches the drawing |
| マーキング | Product identification defined |
| トレーサビリティ | Kit/component IDs defined |
| 偏差 | Declared and approved |
| コメントを確認し | 休診⽇ |
| 承認ステータス | Released according to project procedure |
This checklist can be used as a practical technical-review worksheet before manufacturing begins.
Common Drawing Approval Mistakes
Approving From the Product Name Alone
“Three-phase grounding set” does not define the complete assembly.
Reviewing an Obsolete Revision
Production may follow different technical data from the approved version.
Checking Cable Cross-Section but Not Individual Lengths
Correct cable size does not prove correct geometry.
Ignoring Actual Clamp Interfaces
A clamp must match the physical connection point.
Approving Topology Without Checking Site Geometry
A theoretically correct arrangement may still not fit the intended connection points.
Not Comparing the Drawing With Test Evidence
The production configuration may differ from the tested configuration.
Ignoring Ferrules and Terminations
The cable-to-clamp interface is part of the complete current path.
Ignoring the Connecting Cluster
The common point can be part of the supported assembly configuration.
Allowing the BOM to Differ From the Drawing
Manufacturing may follow the wrong component list.
Leaving Operating-Pole Interfaces Undefined
The supplied pole may not fit the clamp mechanism.
Accepting Hidden Technical Deviations
Differences should be declared before approval.
Approving Through Uncontrolled Messages
The factory may not know which revision is final.
Starting Production Before Comments Are Closed
The project may later require rework.
Waiting Until FAT to Discover a Drawing Error
FAT should verify production against an approved drawing, not become the first detailed engineering review.
How We Review a Portable Earthing Set Drawing Before Production
When we prepare a project-specific portable earthing set for production, we review the technical package in a fixed sequence.
We Confirm the Current Drawing Revision
We make sure engineering, production, sales, and the customer are reviewing the same document.
We Compare the Drawing With the Approved RFQ
We check the required fault duty, interfaces, topology, cables, accessories, and documentation.
We Confirm the Connection Topology
We identify the phase and earth current path clearly.
We Check Each Lead Separately
We review conductor material, cross-section, and length for each phase and earth lead.
We Compare the Layout With Site Geometry
We review the approved connection distances and interface information supplied by the customer.
We Match Each Clamp to Its Connection Point
Phase clamps and earth clamps are checked against the actual interface.
We Review Ferrules and the Cluster
The complete current path is reviewed as one assembly.
We Compare the Drawing With Technical Evidence
We check whether the proposed production configuration remains supported by the declared fault-duty evidence.
We Compare the Drawing With the BOM
Component references and quantities should agree.
We Confirm Operating Poles and Accessories
The complete delivery scope is reviewed before release.
We Define Marking and Traceability
Kit IDs and component identification are included in the production requirements where required.
We Record Technical Deviations
Any proposed difference from the approved requirement is made visible.
We Close Review Comments
A revised controlled drawing is issued when technical changes are required.
We Release the Approved Revision to Production
Manufacturing should follow the final controlled document.
After production, the next control point is FAT.
現場の声を力強いメッセージへ。 factory acceptance checklist for portable earthing and short-circuiting sets explains how the finished assembly should then be compared with the approved drawing.
FAQ About Portable Earthing Set Drawing Approval
Should a Portable Earthing Set Drawing Be Approved Before Production?
For custom, project, tender, or technically controlled orders, drawing approval is often an important part of the supplier-submittal process. The exact approval requirement should follow the contract, purchaser specification, and project procedure.
What Should a Portable Earthing Set Drawing Show?
It should identify the complete configuration, including topology, cables, individual lengths, phase clamps, earth clamp, terminations, cluster, operating pole, accessories, relevant technical references, and identification requirements.
Is a Quotation Drawing the Same as an Approved Production Drawing?
Not automatically. A quotation drawing may be preliminary. The production drawing should reflect the final approved technical configuration and controlled revision.
Should the Test-Report Drawing Match the Production Drawing?
The buyer should be able to understand how the available technical evidence relates to the proposed production configuration. Material differences should be declared and reviewed.
Does an Approved Drawing Prove the Fault-Current Rating?
No. The drawing defines the proposed configuration. The declared fault-duty rating still needs suitable supporting technical evidence.
Should Each Cable Length Be Shown Separately?
For multi-lead assemblies, this is good procurement practice because different phase and earth leads may require different lengths.
What Happens if the Supplier Changes a Clamp After Drawing Approval?
The change should be technically reviewed. Depending on the project and significance of the change, a revised drawing, deviation approval, and review of supporting evidence may be required before production continues.
Is a Purchase Order Enough to Start Manufacturing?
That depends on the contract. If technical drawing approval is required, PO issuance should not automatically be treated as production approval.
実用的な購入者向け要約
A portable earthing set drawing should be reviewed as a configuration-control document, not as a product illustration.
製造前に、以下を確認してください。
- 図面番号
- リビジョン
- プロジェクト参照
- 接続トポロジ
- ケーブル材料
- ケーブルの断面
- Individual lead lengths
- 位相クランプ
- アースクランプ
- フェルール
- 終了
- 接続中のクラスター
- 操作ポール
- アダプター
- Accessories
- Fault-duty reference
- Supporting technical evidence
- GOOD
- マーキング
- トレーサビリティ
- 技術的な逸脱
- コメントを確認し
- 承認ステータス
The strongest approval chain is:
Approved RFQ → Site and Interface Data → Supplier Drawing → BOM → Technical Evidence → Comment Closure → Approved Revision → Production → FAT
The drawing-review stage is where the buyer can confirm that the factory is about to manufacture the correct assembly.
FAT comes later.
FAT should verify that the finished product matches the approved production drawing.
It should not be the first time the project discovers that the cable lengths, clamps, topology, or BOM were wrong.
For the full procurement sequence, buyers can start with 入札で携帯型接地キットを指定する方法、 レビュー 携帯用接地キットの故障電流定格, and then use our portable earthing set FAT checklist 製造後。
For available configurations, see our 携帯型接地・短絡対策キット.
現地の規制および現場の安全手順に従ってください。
