400 amp service disconnect

Question

Nov 23, 2007, 04:26 AM

Stickdude

New Member

Join Date: Oct 2007

Posts: 5

400 amp service disconnect

I am installing a 400 amp service (non-residential). Outside of the building I want to put a Combination Service Entrance Device (meter main) with two 200 amp breakers. These breakers will feed two 42 circuit load centers located inside and directly behind the CSED. Do I need main breakers in each of these load centers? I think it would be a good idea even if is not required.

Answers

Nov 23, 2007, 04:34 AM	#2

tkrussell

Electrical & Lighting Expert

Join Date: Jan 2005

Posts: 4,555

Main breakers are not required in these panels fed by the actual Main Service Disconnecting Means, which are the two 200 amp Mains at the meter.

You may have Main breakers in the panels if desired for convenience and redundant protection, but not required by Code.

Just be sure to do the grounding of the neutral at the meter/disconnect combo, and use 4 wire feeder to both panels, and keep the neutral and equipment ground separate in both panels.

Answer this Question Ask about Electrical & Lighting

« Previous Question | Next Question »

Question Tools	Search this Question
Show Printable Version Email this Page	Search this Question: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Sponsors

Similar Questions
Question	Asker	Topic	Answers	Last Post
400 amp service, 2 200 amp panels, 320 amp meter socket	GShelton	Electrical & Lighting	7	Jun 9, 2008 10:11 PM
400 amp service with 2-200 amp panels & 320 amp socket	jimmyj71	Electrical & Lighting	6	Oct 31, 2007 09:20 AM
grounding for 400 amp service	clm328	Electrical & Lighting	1	Oct 21, 2007 03:58 AM
400 amp service	matchbox	Electrical & Lighting	1	Sep 30, 2007 03:22 AM
400 amp service for home	canfield	Electrical & Lighting	2	Sep 24, 2007 11:23 AM



At Ask Me Help Desk you can ask questions in any topic and have them answered for free by our experts. To ask questions or participate in answering them you must register for a free account. By registering you will be able to: Get free answers from experts in any of our 300+ topics. Accept money for answers that you provide. Communicate privately with other members (PM). See fewer ads. Sign Up!