Whole House Surge Protect Sub Panel

accesspro · Feb 14, 2010

I am finishing adding a new sub-panel for a customer.
The main panel has no more room in it and is flush mounted on the exterior of the house.
I want to add some surge protection. Would my installing a whole house surge protector at the sub-panel be much different than at the main?
The sub is mounted back to back to the main and is fed w/ #8s.

TIA

Bob

JWelectric · Feb 16, 2010

If it is wired into a remote distribution panel then it wouldn’t be whole house would it?

Sponsor · 2022-01-29T12:20:58-0800

Alectrician · Feb 17, 2010

Uhhhh....that was the question.

If it's wired into the main panel thru a breaker it protects everything on the bus....right? Does iot protect anything downstream on a sub panel? If so, would it not do the same thing in reverse since th sub and main are connected?

I have no idea. I was hoping someone would know.

JWelectric · Feb 17, 2010

220/221 said:
Uhhhh....that was the question.

If it's wired into the main panel thru a breaker it protects everything on the bus....right? Does iot protect anything downstream on a sub panel? If so, would it not do the same thing in reverse since th sub and main are connected?

I have no idea. I was hoping someone would know.

Yes it will take the surge no matter where on the system it is installed

Jim Port · Feb 18, 2010

IIRC the instructions call for the surge protection to be as close to the main breaker as possible. A subpanel certainly would not meet this.

Alectrician · Feb 19, 2010

IIRC the instructions call for the surge protection to be as close to the main breaker as possible

A subpanel certainly might meet this.

Whole House Surge Protect Sub Panel

accesspro

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JWelectric

Electrical Contractor/Instructor

Sponsor

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Alectrician

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JWelectric

Electrical Contractor/Instructor

Jim Port

Electrical Contractor

Alectrician

DIY Senior Member

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