If I have two main panels in my home will I need to use two transfer switches?

If the main service comes off of the meter as one feed and splits in a separate junction box, the single feed can be interrupted by one transfer switch if permissible by local code. If the main services come off the meter as two feeds (one to each panel, no junction box in between), one transfer switch would be required for each feed. The reason for this is you cannot take an already split-feed, and bring it back together.

  • Sep 18, 2023
  • Knowledge

Title
If I have two main panels in my home will I need to use two transfer switches?
URL Name
If-I-have-two-main-panels-in-my-home-will-I-need-to-use-two-transfer-switches

Public Answer
Always confirm with local codes

The number of transfer switches required will be based on local codes, but will also be determined by how the service is split to the main panel. If the main service comes off of the meter as one feed and splits in a separate junction box, the single feed can be interrupted by one transfer switch if permissible by local code. If the main services come off the meter as two feeds (one to each panel, no junction box in between), one transfer switch would be required for each feed. The reason for this is you cannot take an already split-feed, and bring it back together.
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