Square D N250MKC Main Breaker Kit
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Core Specs
See full specsSquare D N250MKC - 250A Main Breaker Kit
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Description
Built for the NF panel platform, the Square D N250MKC is a main breaker kit rated for 250A at 600Y/347VAC. It has 1- and 3-phase ratings and 2- and 3-pole breaker configurations. The kit belongs to the N series and has a K frame. It carries cULus approval.Specifications
| Brand | Square D |
|---|---|
| Part Number | N250MKC |
| Series | N |
| Amperage | 250A |
| Poles | 2, 3 |
| Voltage | 600Y/347VAC |
| Phase | 1, 3 |
| Frame Type | K |
|---|---|
| For Use With | K Frame Circuit Breaker, NF Panelboards |
| Accessories | Cover Plate, Mounting Plate, Bracket, Screw Set, Connector, Rail Extension, Rail Splice, Label |
|---|---|
| Approval | cULus |
Product FAQs
6 answersHow should I use the 250A current rating when selecting this kit?
The 250A rating is the breaker's rated current. Coordinate that rating with the calculated load and conductor ampacity when selecting protection for the circuit.
What phase and pole configurations should I consider?
The kit covers single-phase and three-phase applications, with 2-pole and 3-pole breaker configurations. Select the pole configuration according to the circuit's phase arrangement and the conductors requiring protection.
Does this kit require a neutral connection?
A neutral connection is not applicable to this kit. Plan the circuit's neutral routing separately from the breaker connections.
What does cULus approval mean when reviewing project requirements?
cULus approval indicates certification for U.S. and Canadian safety requirements. Use this approval when checking the project's required product certifications.
What should I check when selecting the Square D N250MKC for a main-breaker project?
The Square D N250MKC is a main breaker kit rated 250A and 600Y/347VAC. Compare both ratings with the project's main-breaker electrical requirements during selection.
What does the 600Y/347VAC voltage rating mean for system selection?
The Y in 600Y/347VAC indicates a grounded-wye AC voltage rating. Use the complete rating when checking the system voltage and grounding configuration for breaker selection.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 11 reviews.
- RSRogelio S.Verified BuyerReviewingAllen-Bradley N15 Overload Heater ElementI recommend this productRated 5 out of 5 stars9/11/25Great!
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- GMG M.ReviewingAllen-Bradley N28 Overload Heater ElementI recommend this productRated 5 out of 5 stars7/28/23Perfect part quick shipping
Easy ordering great shipping would order again
- DWDavid W.ReviewingAllen-Bradley N36 Overload Heater ElementI recommend this productRated 5 out of 5 stars8/10/22Great delivery
Thanks for the quick delivery of these pieces.
- RHRaymond H.ReviewingAllen-Bradley N13 Overload Heater ElementI recommend this productRated 5 out of 5 stars2/23/22hard to find parts
Great price and fast shipping on hard to find parts.
- ASAlan S.ReviewingAllen-Bradley N37 Overload Heater ElementI recommend this productRated 5 out of 5 stars8/28/21Very pleased!!!.. exactly as described!
Very pleased!!!.. exactly as described! Quick shipping!! Would use site again!! Highly recommend!!