Use controlled application inputs and a representative validation plan before treating an interface choice as a release decision.
Contents
Begin with the controlled system architecture, intended voltage class, transient and pollution context, insulation concept, installation environment, and applicable standard selected by the program. This guide does not supply a spacing value or compliance conclusion.
| Insulation-planning input |
Project record to provide |
Decision it supports |
| Live-conductor arrangement |
Relevant voltage domain, conductive parts, mating pair, and current drawing |
Identifies which separation paths need analysis |
| Insulation environment |
Pollution exposure, enclosure condition, altitude assumptions, and service state |
Establishes the design basis rather than a generic connector label |
| Verification plan |
Representative sample, measurement or test plan, acceptance record, and revision triggers |
Keeps evidence tied to the reviewed configuration |
Part 2. How should clearance be mapped?
Clearance is evaluated through air between defined conductive parts under the governing design basis. Build a drawing-level map of terminals, busbars, housing features, fasteners, and adjacent assemblies so the program can identify the relevant shortest paths.
Part 3. How should creepage be mapped?
Creepage follows the insulating surface between conductive parts. Surface geometry, contamination exposure, material characterization, mold parting lines, ribs, and assembly interfaces can all affect the path that must be evaluated under the selected requirements.
Part 4. Why do materials and interfaces need separate review?
The plastic housing, seals, coatings, inserts, and adjacent structures are not interchangeable assumptions. Record the actual materials, their documented properties where required, and every interface that can alter the insulation path or environmental exposure.
| Material or interface question |
Evidence to review |
Selection limitation |
| Which insulating surfaces form the path? |
Housing geometry, rib details, insert locations, and the current drawing |
A nominal material name does not establish the finished path |
| What environmental conditions affect the interface? |
Program-defined exposure, conditioning, and installation assumptions |
Results need the stated conditions to be comparable |
| How are material or tooling changes handled? |
Change notice, revised sample plan, and reassessment trigger |
Final release remains with the responsible project team |
Important: Creepage and clearance are evaluated against the governing design basis and the stated configuration. A category-level description is not a spacing rule or a finished-system approval. (IEC Webstore)
Part 5. What should the validation boundary include?
Specify the representative build, measurement method, environmental conditioning, dielectric or insulation evaluations only where the approved plan calls for them, acceptance criteria, safety controls, and change conditions. Do not transfer evidence from a different assembly.
Part 6. How can an RFQ preserve the design intent?
Give suppliers the controlled drawing, mating arrangement, system context, material restrictions, environmental inputs, requested documentation, samples, and change-control expectations. Ask them to state open assumptions for engineering review.
Part 7. Which ZUCH route supports a controlled inquiry?
For a component-category starting point, review ZUCH’s energy storage connector page with the product catalogue. The category can support early comparison, but the project still needs to establish actual insulation distances, configuration, and acceptance evidence.
RFQ inputs
- Current drawing, mating arrangement, voltage-domain context, and intended assembly location.
- Pollution, enclosure, installation, service, and environmental assumptions used by the project.
- Requested material evidence, representative samples, insulation-review method, and acceptance path.
- Revision notification, substitution controls, documentation needs, and nonconformance process.
Fit Boundary
This guide supports a bounded engineering and sourcing discussion. It organizes the inputs that must be reviewed, rather than releasing a finished design. Submit configuration details through ZUCH’s sample request page or contact channel for a controlled component discussion.
FAQ
What is the difference between creepage and clearance?
Clearance is the shortest air distance; creepage is the path along an insulating surface. Both require evaluation against the applicable design basis.
Can a generic connector spacing be used for an energy storage system?
No. The required evaluation depends on the actual system, environment, insulation coordination approach, and applicable requirements.
Do plastics affect creepage evaluation?
Yes. The relevant material and surface configuration are design inputs that must be considered under the selected program requirements.
Does this article give high-voltage spacing values?
No. Values must come from the governing standard and controlled application inputs, reviewed by the responsible engineering function.
What should be included in a connector RFQ?
Include drawings, mating interfaces, system context, environmental conditions, material restrictions, validation requests, sample needs, and record requirements.
Can a catalog route prove compliance?
No. A catalog route supports product discovery only; compliance and approval require configuration-specific evidence.
References
Zhejiang ZUCH Technology Co., Ltd.
