How To Look At A House

McGarry and Madsen's home inspection blog for buyers of  

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Does a whole-house surge protector need a dedicated circuit breaker?

Thursday, April 14, 2022

Manufacturer instructions for Type 2 surge protectors (installed load side, after main breaker) specify connection to a dedicated unused breaker. Here’s an example from an Eaton surge protector installation manual:

    So a double-tap to a 240-volt breaker that is already serving another circuit is not acceptable. The example shown below also has an additional problem: it is both double-tapped to a breaker for another circuit (top arrows) and the device is installed inside the panel box, so that the small green light that indicates whether the device is still functional is not visible without removing the dead front (bottom arrow).

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Here’s a few related articles about SURGE PROTECTORS:

• How do I find the right whole house surge protector? 

• Why is an undersized wire between a circuit breaker and whole-house surge protector acceptable?

• Can a home surge protector be installed loose in the bottom of an electrical box?

 What is life expectancy of whole house surge protector?  

• Can you plug a surge protector into a two prong outlet?

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