Compare the complete wire specification
Silicone and PVC are useful starting points for an equipment-wire enquiry, but neither name describes a complete wire specification. Compare the selected conductor, insulation construction, dimensions and operating conditions together.
PVC means polyvinyl chloride. Silicone and PVC are different insulation-material families; the chosen compound and finished cable design still matter. Manufacturer technical guidance treats insulation selection as an application decision that includes electrical requirements, operating temperature and other conditions. That is a reason to request product-specific information rather than assign one universal rating to a material label.
For Relia Cables catalogue enquiries, start with the Silicone & High-Temperature Wire or PVC Hook-Up & Equipment Wire range. Identify the exact product and selectable size before comparing alternatives.
Put the two options on the same comparison sheet
| Compare | What to record for each wire |
|---|---|
| Conductor | Material, bare or coated construction, nominal size and stranding where specified. |
| Insulation | Actual material description, thickness or finished dimensions, and the selected wire style. |
| Temperature conditions | Required service and installation conditions, then the selected product's stated limits. |
| Mechanical duty | Fixed routing or movement, available bend space, abrasion points and termination method. |
| Electrical and project requirements | Required voltage scope, applicable specification, requested documents and acceptance criteria. |
Keep the comparison specific. A claim attached to one listed construction does not automatically apply to every wire in the same material collection.
Describe the equipment environment
Tell the supplier where the wire sits and what happens around it. A short internal connection beside a heat source raises different questions from a cable passing through a moving joint or an exposed enclosure opening. State the expected temperatures, contact with liquids or chemicals, vibration and any repeated movement that is part of the real application.
Ask for the information relevant to those conditions. Do not substitute a flexible feel, a colour or a product photograph for a documented construction. If the equipment design specifies a particular wire style, retain that requirement in the RFQ and identify any proposed alternative separately.
Keep termination details in the request
State whether the wire is supplied on a reel, cut to length or prepared for a connection. If end preparation is requested, include strip lengths, terminal references and assembly dimensions. Request confirmation of the proposed preparation rather than assuming that every catalogue wire can be supplied in every finished form.
Use reference photographs with labelled details
If photographs help explain your equipment, identify the wire route and the point where each end terminates. Show any dimension that restricts the finished wire rather than leaving the supplier to estimate it from an image. Link the photographs to the drawing revision or product reference in the enquiry.
When using a previous assembly as a reference, list the features to retain and the changes being considered. A different colour, insulation material, conductor construction or preparation is a separate requirement that should appear in the written request. This creates a useful record for reviewing the offered alternative and checking whether a later quotation still describes the intended wire.
Keep required documents on the same request list. Identify whether the team needs product-specific dimensional information, a proposed drawing or another defined record before making the selection. Discuss availability and scope for the actual product rather than assuming that every requested document accompanies every catalogue option.
A clearer RFQ for a material comparison
Instead of asking only for “silicone or PVC wire,” send the selected catalogue references and explain the comparison you need:
- Conductor material, nominal size and preferred stranding.
- Insulation requirement or the two candidate product references.
- Core count, identification colours and finished dimensions.
- Equipment location, service conditions and relevant project specification.
- Requested quantity, length format and destination.
- Any document or sample review needed before order confirmation.
The Cable Selection Guide provides a wider checklist. Use the RFQ & Ordering Guide to keep technical and commercial details together.
Write the service conditions in plain, measurable terms
Start with the place where the wire will be used. Record whether it sits inside a cabinet, passes between two equipment parts or continues outside an enclosure. Identify the parts of the route that see heat, contact with a housing or movement during use. A clear description helps turn a broad request for a different insulation material into a comparison of specific candidate wires.
Separate the temperature expected during service from the conditions during installation or handling. If the equipment documentation states a temperature requirement, attach that reference and identify the relevant part of the assembly. If the condition has not yet been established, say that it is open rather than filling the field with a typical value found in a general material guide.
Likewise, distinguish regular exposure from an occasional event. Ask the supplier to review the actual described duty against the offered construction. The enquiry should make it clear which conditions are mandatory design requirements and which are questions awaiting confirmation from the equipment team.
Keep the original design reference
When replacing an existing wire, send the existing drawing or specification together with the requested change. Explain whether the purpose is dimensional, thermal, identification-related or associated with assembly handling. Retain requirements that have not changed so the comparison does not quietly become a different product enquiry.
Compare the finished form as well as the insulation
A reel of single-core wire, a cut length and a terminated assembly are different purchasing requests. Identify which form you need before asking for a material alternative. For cut lengths, specify the finished length and tolerance. For prepared ends, include the termination reference and dimensional details that your assembly process uses.
Where the wire must pass through a defined space, ask for the offered finished dimensions. Put any maximum diameter, entry clearance or routing limitation in the enquiry as an equipment requirement. Keep conductor size, insulation thickness and finished diameter in separate fields so that a change in one is not mistaken for agreement to change the others.
Colour and identification also deserve separate attention. State the required colours, whether different colours have different quantities and whether the project calls for any marking. If a photograph is used to explain a colour or arrangement, label it as a reference and retain the written specification for the proposed build.
Use a like-for-like quotation table
When purchasing reviews two alternatives, give each candidate its own row. Leave uncertain values open for an explicit answer. This is more useful than a single combined description that blends the construction of one option with the dimensions of another.
| RFQ field | Candidate A | Candidate B |
|---|---|---|
| Reference | Exact silicone-wire product and selected option. | Exact PVC-wire product and selected option. |
| Unchanged requirements | Required conductor, size and identification. | The same project requirements, unless a difference is stated. |
| Items under review | Listed dimensions and conditions to confirm. | Listed dimensions and conditions to confirm. |
| Supply form | Reel, cut length or requested preparation. | The corresponding requested form. |
| Documents | Required drawing or product-specific information. | Equivalent information for this candidate. |
Compare the answers against the equipment requirement, then retain the selected reference in the quotation and order documents. A lower price or a familiar material name does not resolve an unanswered construction question.
An example of a better material-comparison request
Consider a hypothetical equipment project that already specifies conductor size, colours and cut length, while the insulation choice is still under review. The purchasing team can send two catalogue links, attach the equipment requirement and ask for the offered construction and documents for each candidate. This identifies a bounded comparison without suggesting that either candidate is already approved for the application.
The message should separate the fixed details from the questions. Fixed details could include the drawing revision, the colour quantities and the length measurement. Open questions could include the offered finished diameter, the product-specific service information and the availability of the requested preparation. The actual values come from the project and supplier response; this example does not supply a generic wire rating.
Once the technical choice is agreed, keep the selected wire reference and any agreed preparation together. If a later quotation proposes an alternative, request a written description of the difference and review the affected details again. That preserves the link between the original comparison and the build eventually ordered.
Questions to resolve before selecting the option
Is silicone always the better choice?
Material selection starts with the actual duty and the selected construction. Compare the documented requirements rather than applying one preferred material to every equipment connection. Where the design team has specified an exact wire style, identify that style and request review of any proposed alternative.
Can colour identify the insulation material?
Use the written product specification and selected option to identify the insulation. A colour photograph is useful for appearance and routing discussion, but keep the material description in the RFQ and quotation. Record colour requirements separately so both technical and appearance details can be checked.
Should a sample request include the full specification?
Yes: include the product reference, proposed construction and the purpose of the review. Specify what the sample is intended to confirm and which details remain open. Sample availability, quantity, cost and timing are items to discuss for the actual enquiry.
Discuss the selected options
Share the wire references and the requirements that are already fixed. Clearly label questions still under review so a quotation can be tied to the intended construction.
Technical background: LAPP Camunacavi material-selection guidance. This explains general selection factors; it is not a specification or certification for Relia Cables products.