Schneider Electric LV429518 — 4-Pole NSX Terminal Shield Guide

By Abdullah Zahid
13 min read
Schneider Electric LV429518 long terminal shield 4-pole IP40 mounted on ComPacT NSX250 circuit breaker in industrial control panel

Schneider Electric LV429518 Long Terminal Shield, ComPacT NSX100/160/250, Pitch 35mm, IP40, 4 Poles — Specifications, Compatibility and Selection Guide

If you are specifying or procuring a terminal shield for a 4-pole ComPacT NSX or EasyPact CVS circuit breaker installation, the Schneider Electric LV429518 is the part that enables safe front-face cable and insulated bar connections while meeting IEC 60947-2 clearance distance requirements. This is not an optional upgrade — it is a compliance-driven insulation accessory covering 0–250 Amp applications across NSX100, NSX160, NSX250, and their EasyPact CVS equivalents, rated IP40 and IK07 for typical industrial panel environments.

If you have already confirmed this is the correct part for your panel, check current pricing and availability for the LV429518 at LeadTime.ca — we ship worldwide.

Who Should Buy the LV429518 — and Who Shouldn't

The LV429518 is the right choice when all of the following apply to your installation:

  • Your circuit breaker is a 4-pole model — this shield covers 4 poles only and will not fit 3-pole or 6-pole configurations
  • Your breaker frame is ComPacT NSX100, NSX160, NSX250, EasyPact CVS100/160/250, Compact INS250, or Compact INV100–250
  • Your installation uses standard 35mm pitch terminal spacing — non-standard spacing will cause misalignment
  • You are making front-side cable or insulated bar connections and require IEC 60947-2 clearance compliance
  • Your installation environment requires at minimum IP40 ingress protection and IK07 mechanical impact resistance
  • Your breaker is mounted as fixed, plug-in, or withdrawable — all three configurations are supported

If your breaker is 3-pole, specify LV429517 instead. If you need a 6-pole configuration, LV429519 is the correct variant. If your installation uses rear-panel connections only, or if your enclosure design already provides contact protection, the LV429518 adds no functional value to that application.

On this page:

What the LV429518 Actually Does Inside a Panel

The LV429518 is an insulation accessory — a physical barrier that mounts directly on the terminal face of a 4-pole ComPacT NSX or EasyPact CVS circuit breaker. Its job is straightforward and non-negotiable in front-connection installations: it prevents direct personnel contact with live power terminals during cable termination, testing, and routine maintenance. Without it, exposed terminals on a front-connected breaker represent both a personnel hazard and a clearance distance failure under IEC 60947-2.

Schneider Electric's own documentation states that the LV429518 allows installations to reach the clearance distance required by IEC 60947-2. That single compliance function is why this accessory appears on virtually every compliant front-connection panel design for the NSX and EasyPact CVS platform. It is not a secondary add-on — in applications where front-side cable or insulated bar connections are used, the shield is a design requirement, not an upgrade option.

The shield mounts on both the upstream and downstream faces of the breaker. Connection method is front connection, supporting both cables and insulated bars. All three breaker mounting types — fixed, plug-in, and withdrawable — are supported, though installation alignment differs slightly by configuration. The 35mm pitch matches the standard terminal spacing across the NSX100, NSX160, and NSX250 frame sizes.

Where the LV429518 Fits in the System

The LV429518 sits at the terminal face of the circuit breaker — between the live breaker terminals and any personnel or adjacent conductors — as the final layer of contact protection before cabling connects to the load or supply side.

  • Upstream supply cables or busbars connect to the panel incomer and feed into the circuit breaker supply terminals
  • The LV429518 mounts on the breaker terminal face (upstream, downstream, or both) to shield exposed live contacts
  • Front-side cables or insulated bars pass through or adjacent to the shield to terminate at the breaker poles
  • The load side continues downstream to motor starters, drives, distribution boards, or field devices
  • The installed shield enables safe access during commissioning and maintenance without removing or isolating the entire panel section

Typical Applications and Deployment Scenarios

The LV429518 is most commonly specified during new control panel design where front-panel accessibility is a project requirement. OEM panel builders designing equipment for industrial customers — particularly those exporting to regions with mandatory IEC compliance audits — treat this shield as a standard bill-of-materials line item for every 4-pole NSX or EasyPact CVS breaker with front-connected cabling.

Retrofit safety upgrades represent a growing application. Plant electrical teams tasked with eliminating direct terminal access on older installations frequently specify the LV429518 as a low-cost compliance path — avoiding full breaker replacement by adding the shield to existing NSX frames already in service.

In equipment commissioning scenarios where multiple technicians need access to energized panels simultaneously, the LV429518 reduces the risk of inadvertent contact during live-circuit testing and measurement work. Industries including manufacturing, oil and gas, mining, renewable energy installations, and HVAC systems all regularly specify this component where front-connection NSX breakers are installed.

Application Typical Deployment
New control panel design Front-connection 4-pole NSX250 in main distribution panel; shield specified at design stage
Retrofit safety upgrade Existing NSX160 installation; shield added to achieve IEC 60947-2 compliance without breaker replacement
OEM panel building for export EasyPact CVS100/160/250 breakers; shield mandatory for IEC-compliant equipment certification
Industrial commissioning Multi-technician panel access during live testing; shield prevents inadvertent contact on NSX breaker terminals
Mining and heavy industry NSX250 in motor control center; front-connection with IK07-rated shield for mechanical impact resistance
Food processing and regulated industries Compliance-audited facilities requiring documented IEC 60947-2 personnel protection on all exposed terminals

Key Specifications and Ratings

Specification Value
Model LV429518
Product Type Long terminal shield (insulation accessory)
Pole Count 4 poles
Connection Pitch 35 mm
Ingress Protection Rating IP40 per IEC 60529
Mechanical Impact Rating IK07 per IEC 62262
Amperage Range 0–250 Amp
Connection Method Front connection — cables and insulated bars
Mounting Types Supported Fixed, plug-in, withdrawable
Warranty 18 months from manufacture

Full technical specifications are available on the product page at LeadTime.ca.

Two ratings deserve specific attention for panel specification purposes. IP40 provides protection against solid objects greater than 1mm but offers no liquid ingress protection — adequate for enclosed industrial control panels but not for wash-down or outdoor environments where IP66 or higher is mandatory. IK07 indicates resistance to mechanical impact up to 2 joules — appropriate for typical panel environments subject to incidental tool contact or vibration, but not for high-impact or rough-service installations where IK10 would be specified.

LV429517 vs. LV429518 vs. LV429519 — Which Variant Do You Need?

Model Number Pole Count Pitch Recommended Use Important Note
LV429517 3 poles 35 mm 3-pole NSX / EasyPact applications Do not substitute for LV429518
LV429518 4 poles 35 mm 4-pole NSX / EasyPact — standard variant for most applications This product
LV429519 6 poles 35 mm 6-pole NSX / EasyPact applications Do not substitute for LV429518

These three variants are not interchangeable. Installing a 3-pole shield on a 4-pole breaker leaves one terminal completely exposed — a direct compliance failure and a safety gap. Verify your breaker's pole count on the nameplate before ordering. If you are uncertain which variant applies to your installation, review the compatibility details on the LV429518 product page at LeadTime.ca.

Expert Verdict: Is the LV429518 the Right Part for Your Project?

The LV429518 is the right specification for electrical engineers and panel designers building systems with front-connection 4-pole NSX or EasyPact CVS breakers where IEC 60947-2 compliance is required. System integrators building OEM panels for industrial customers, plant maintenance teams retrofitting older NSX installations to meet tightened safety requirements, and control panel builders working in compliance-audited industries — food processing, medical equipment, mining, or any application subject to IEC safety audits — will find this shield is not a discretionary line item. Schneider Electric's own documentation confirms it enables the clearance distances required by IEC 60947-2, and the IP40 plus IK07 ratings confirm it performs adequately in standard enclosed panel environments without degradation under normal service conditions.

There are real limits to understand before specifying. The LV429518 is IP40 only — if your installation environment requires IP66 or higher protection, this shield does not qualify and you will need to assess alternative guarding solutions or a different enclosure architecture. It is also strictly a 4-pole accessory — if your project mix includes 3-pole NSX breakers, you need LV429517 alongside or instead. For installations using rear-panel connections only, or where the enclosure design already provides equivalent contact guarding, this component adds no compliance value. The 18-month warranty covers manufacturing defects; the shield itself has no serviceable components, but periodic visual inspection for cracks or looseness during routine panel maintenance is advisable.

On the procurement side, availability varies meaningfully between sourcing channels. Factory ordering through Schneider Electric directly typically results in 4 or more weeks lead time. Authorized automation specialist distributors generally carry stock and can deliver in approximately 2–3 weeks — though lead times fluctuate and should always be confirmed before committing to a project schedule. General online retailers frequently list NSX accessories as non-stock, extending lead times to 4–6 weeks. For time-sensitive panel builds or retrofit projects with fixed commissioning dates, sourcing through a specialist distributor also provides a compatibility verification step that eliminates the pole-count ordering errors that cause the most common installation delays. Check current stock status and lead time for the LV429518 at LeadTime.ca — we ship worldwide and can confirm availability before you finalize your order.

For volume orders or projects requiring delivery confirmation before build commitment, contact the LeadTime.ca team directly — we serve procurement teams and engineers worldwide and can provide lead time visibility before your order is placed.

What Engineers Need to Know Before Ordering the LV429518

Terminal shields like the LV429518 occupy a specific and sometimes underappreciated category in panel design: they are specification-driven compliance components that engineers order once, install correctly, and never think about again — unless the wrong part arrives on the build date. Because there is no active troubleshooting community around accessories of this type, the guidance that matters comes from the specification itself and from distributors who have seen the ordering mistakes happen.

The most consequential mistake in this product category is pole count confusion. The LV429518, LV429517, and LV429519 share the same product family, the same 35mm pitch, and the same compatible breaker platforms — the only difference is pole count, and that difference makes each variant completely non-interchangeable. A 3-pole shield on a 4-pole breaker does not leave a small gap. It leaves a full terminal face exposed, which is both an IEC 60947-2 failure and a direct personnel hazard. Panel builders ordering multiple NSX accessories at once are particularly vulnerable to this error if the order is placed from a BOM without nameplate verification at the breaker level.

The second recurring specification issue is IP rating adequacy. Engineers familiar with outdoor or wash-down environments sometimes flag IP40 as insufficient during design review. This is correct for those environments — IP40 is not a wash-down or outdoor rating. However, for standard enclosed industrial control panels where the enclosure itself provides the environmental protection, IP40 is the appropriate and required rating for this accessory category. If an application genuinely requires IP66 contact protection at the terminal face, the architecture question needs to be addressed at the enclosure level, not by substituting a higher-rated terminal shield in the NSX accessory line. Consulting with a specialist distributor who can verify your application requirements against the available Schneider Electric accessory catalog prevents this from becoming a design revision after the panel build has started.

Installation and Mounting Overview

The following overview covers the key verification and mounting steps for the LV429518. Engineers requiring full installation procedures should consult Schneider Electric's official product documentation for detailed torque specifications, mechanical fastening instructions, and panel-specific guidance.

  • Before handling the shield, de-energize and lock out the circuit breaker — the LV429518 is installed on live-terminal-adjacent faces and requires full lockout/tagout compliance before positioning
  • Confirm the breaker nameplate matches the LV429518 compatibility list (NSX100/160/250 or EasyPact CVS100/160/250) and verify the pole count is 4 before positioning the shield
  • Align the shield pitch holes with the 35mm terminal spacing on the breaker face — verify all four poles are fully covered with no terminal face left exposed before securing
  • Secure the shield according to Schneider Electric mounting documentation for the specific breaker mounting type (fixed, plug-in, or withdrawable configurations have slightly different alignment requirements)
  • After installation, perform a visual inspection verifying IP40 sealing integrity around all edges and confirm the shield cannot shift under hand pressure before reconnecting the circuit

Breaker Compatibility Matrix

Breaker Model / Frame Compatibility Pole Count Notes
NSX100 Compatible 4 poles Verify pitch on existing equipment
NSX160 Compatible 4 poles Verify pitch on existing equipment
NSX250 Compatible 4 poles Verify pitch on existing equipment
EasyPact CVS100 Compatible 4 poles Verify pitch on existing equipment
EasyPact CVS160 Compatible 4 poles Verify pitch on existing equipment
EasyPact CVS250 Compatible 4 poles Verify pitch on existing equipment
Compact INS250 Compatible 4 poles Verify pitch on existing equipment
Compact INV100–250 Compatible 4 poles Verify pitch on existing equipment
Other breaker families Not compatible — Consult Schneider Electric for equivalents

Wrong-Part Prevention Checklist

Before submitting your purchase request for the LV429518, work through each item on this checklist. These are the verification steps that prevent the most common ordering errors for this product family.

  1. Confirm exact circuit breaker model number on terminal block (NSX100/160/250 or EasyPact CVS equivalent)
  2. Verify pole count — LV429518 is 4-pole ONLY; 3-pole and 6-pole models are different part numbers
  3. Check mounting type — confirm whether breaker is fixed, plug-in, or withdrawable (all three are compatible, but must verify)
  4. Confirm pitch — 35mm is standard; non-standard spacing will cause misalignment
  5. Check application — terminal shield is for front-side cable/bar connections; not for rear-panel installations
  6. Verify upstream/downstream availability — compatible both upstream and downstream but not suitable for all breaker families
  7. Confirm no other protection already installed — do not double-stack shields
  8. Check warehouse compatibility code — ensure distributor is shipping LV429518 not a similar model (LV429517, LV429519)

If any item on this checklist raises a question before you order, contact the LeadTime.ca team — we can cross-reference your breaker model against the LV429518 compatibility matrix before the order ships.

Frequently Asked Questions

Can I use the LV429518 on a 3-pole NSX breaker if I leave one slot unused?

No. The LV429518 is a 4-pole shield and its mechanical geometry is designed for 4-pole terminal spacing. Attempting to fit it on a 3-pole breaker will result in misalignment, and a 3-pole breaker with a 4-pole shield improperly seated creates a safety gap rather than eliminating one. Use LV429517 for all 3-pole applications.

Is 35mm pitch confirmed across all compatible NSX frame sizes, or does it vary between NSX100 and NSX250?

35mm is the standard pitch across NSX100, NSX160, and NSX250 and their EasyPact CVS equivalents as documented by Schneider Electric. However, for retrofit applications where existing equipment may have been modified or where non-standard terminal blocks have been installed, always physically measure the terminal spacing before ordering rather than relying solely on the nominal specification.

Does IP40 mean the LV429518 is suitable for outdoor or wash-down panel installations?

No. IP40 provides protection against solid objects larger than 1mm but offers no liquid ingress protection. The LV429518 is rated for standard enclosed industrial panel environments. Applications requiring wash-down resistance, outdoor installation, or higher environmental protection must address those requirements at the enclosure level — the LV429518 is not available in IP66 or higher ratings for the 4-pole configuration.

What is the correct position — upstream or downstream — for the LV429518 in a front-connection installation?

Both upstream and downstream mounting positions are compatible with the LV429518. The correct position for your specific installation depends on where front-face cable connections are made and where the personnel contact risk exists in your panel layout. Your panel design documentation and IEC 60947-2 clearance distance assessment should define the required position — consult that documentation rather than assuming a universal default position.

Does the LV429518 work with a withdrawable NSX breaker the same way it does with a fixed installation?

All three mounting types — fixed, plug-in, and withdrawable — are listed as compatible with the LV429518. The installation alignment and securing method differ by mounting type. Schneider Electric's official documentation for your specific breaker configuration contains the correct mounting procedure for withdrawable units; do not assume the fixed-mount procedure applies directly.

What is the typical lead time for the LV429518, and is it stocked in North America?

Lead time varies significantly by sourcing channel. Ordering directly from Schneider Electric typically results in 4 or more weeks lead time as it is frequently a non-stock factory order. Authorized automation specialist distributors including those serving Canada and North America broadly typically deliver in approximately 2–3 weeks when stock is held. General online retailers often list this as non-stock with 4–6 week lead times. Verify current stock status and lead time directly with your distributor before committing to a project schedule.

Why Order From LeadTime.ca

  • LeadTime.ca ships the Schneider Electric LV429518 and related NSX accessories worldwide — no geographic restriction on sourcing
  • Specialist distributor inventory visibility means you can confirm stock and lead time before placing the order, not after
  • Compatibility cross-referencing available for NSX terminal shield variants — our team can verify pole count and frame compatibility against your breaker model before the order ships
  • Volume pricing available for panel builders and OEMs ordering multiple units across a project BOM
  • Response time and order support suited to project procurement timelines — not general retail fulfillment cycles

At-a-Glance Summary

  • Schneider Electric LV429518 is a 4-pole long terminal shield for ComPacT NSX100, NSX160, NSX250, EasyPact CVS100/160/250, Compact INS250, and Compact INV100–250 circuit breakers
  • Connection pitch is 35mm — standard across all compatible NSX frame sizes
  • Rated IP40 per IEC 60529 and IK07 per IEC 62262 — suitable for standard enclosed industrial panel environments
  • Covers 0–250 Amp applications; supports front connection via cables and insulated bars
  • Enables IEC 60947-2 clearance distance compliance — the primary compliance function documented by Schneider Electric
  • Compatible with fixed, plug-in, and withdrawable breaker mounting types
  • Warranty: 18 months from manufacture
  • Related variants: LV429517 (3-pole), LV429519 (6-pole) — none are interchangeable
  • Typical lead time from specialist distributors: approximately 2–3 weeks; verify before committing to schedule
  • Not suitable for rear-panel-only installations, IP66-required environments, or non-NSX/EasyPact breaker platforms

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