Admin Table of Contents
Does a subpanel need to have a main breaker?
Subpanel main breaker A main breaker on a sub-panel is not necessary because this is in the same building (if you are in a different building then NEC 225.31, 225.32, 225.33 apply). That said, having a main breaker in the sub-panel is also acceptable.
What if my breaker box doesn’t have a main breaker?
Since your panel does not appear to have a main breaker, you would need to call your power company and have them come out and pull the meter. They need to do that anyway to investigate the lost neutral. Now might be a good time to get a meter pan which contains a main breaker.
Can an electrical sub panel feed another sub panel?
Yes, it’s redundant, but it’s still required. The wire feeding the new subpanel must be protected from overcurrent by an appropriately-sized breaker. It can be at either end – in the old subpanel or in the new subpanel – or at both ends.
Can a 60 amp breaker feed a 100 amp sub panel?
You can feed a 100 Amp panel with a 60 Amp breaker. Keep in mind that the sub panel needs to be rated above the breaker size.
Can a house not have a main breaker?
There is another type of panel that looks, at first glance, like it might be missing a main breaker. This type of panel is configured such that it takes a maximum of 6 throws to shut all the power off. This type of Service Panel is called a Split-Bus Panel.
What is the 6 throw rule?
The “rule of six” refers to how many breakers or throws it takes to disconnect a building from the electrical supply, so if you have more than six breakers in a box at your service entrance there needs to be a disconnect upstream of it, either in the panel or upstream.
Can you have 2 subpanels?
You can have as many subpanels as you want, provided the combined total demand doesn’t exceed 160 amps. This means that you’ll have to do some planning, and keep track of exactly which sub panels you add so you don’t exceed the amperage.
Can I daisy chain subpanels?
You could daisy-chain a feeder from the main service panel (Panel A) to a subpanel (Panel B), and then run another feeder from Panel B to another subpanel (Panel C).