Circuit Breaker Enclosure · 600A, 600V AC · NEMA 1 Indoor, M4 Frame · Noark Electrical X600-600TYPE 1
X600-600TYPE 1
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Neutral terminal assembly · 600A · M4 frame enclosed breaker accessory · NOARK Electric NT-4B
SKU: NT-4B
600A neutral terminal assembly for NOARK M4 frame enclosed breakers in 3-wire/4-wire distribution applications. Source-supported listings indicate this NT-4B configuration is used with M4 600A enclosed breaker systems and is commonly shown with a 2-conductor lug arrangement; confirm enclosure and conductor requirements before ordering.
What this product is for
The NOARK Electric NT-4B is a neutral terminal assembly used in enclosed circuit breaker applications where a neutral termination is required. It is matched to NOARK M4 frame enclosed breaker configurations and is rated 600A for higher-current distribution equipment.
Use for
Use this neutral assembly in service entrance equipment, switchboards, distribution sections, and enclosed breaker installations that require a neutral landing point for 3-wire/4-wire systems. It is suited to contractors and panel builders matching accessories to NOARK Ex9 M Series enclosed breaker assemblies.
Avoid for
Avoid using this part where the breaker frame, enclosure series, or neutral configuration does not match the NOARK M4 enclosed breaker assembly. Do not assume lug capacity, conductor range, or mounting compatibility beyond the published NT-4B/M4 references without confirming the exact enclosure bill of materials.
Best for
Best for 600A enclosed breaker builds where a factory-matched neutral terminal is needed instead of field improvisation. This helps buyers maintain accessory compatibility and streamline panel assembly.
Installed in
Typically installed inside enclosed breaker equipment, service disconnect assemblies, and power distribution enclosures using NOARK M4 frame breakers. In Canadian commercial and industrial work, this type of accessory is commonly selected when neutral termination must be integrated within the enclosure.
Why this product exists
Enclosed breakers do not always use the same neutral arrangement, so NOARK offers dedicated neutral terminal options by frame and ampacity. The NT-4B exists to provide a matched 600A neutral assembly for applicable M4 frame enclosed breaker systems, supporting code-compliant equipment configuration when a neutral is required.
Compared with similar products
Compared with lower-rated neutral terminal options such as NT-1A, NT-2A, and NT-3A, the NT-4B is the 600A option associated with the M4 frame range. Distributor listings also indicate this SKU is commonly described as a 2-conductor lug version, which may matter where parallel or larger neutral conductors are being terminated. Always verify the exact lug style and enclosure compatibility against the project submittal.
Typical buying guidance only: in larger 600A distribution equipment, neutral accessories are often selected at the same time as enclosure type and breaker frame to avoid fit-up issues during assembly. Actual suitability depends on the enclosure design, conductor size, layout, and local electrical code.
Specifications
- Manufacturer: NOARK Electric
- Manufacturer part number: NT-4B
- Product type: Neutral terminal assembly
- Ampere rating: 600A
- Associated frame: M4 frame
- Application: Enclosed circuit breakers / neutral terminals
- System use: Neutral termination where required for applicable 3-wire/4-wire systems
- Standards context: NOARK enclosed breakers are published to UL 489 and CSA C22.2 No. 5 for applicable assemblies
- Lug configuration: Commonly listed by distributors as 2-conductor lugs; confirm against the exact assembly requirement before purchase
Minimum Order $20
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Standard Shipping-Free on orders over $500 in Metropolitan Areas / Subject to $750 in Rural Areas.
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998(Updated August 2026)
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.
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