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#150 amp panel with 100 amp breaker feeding how to#
#150 amp panel with 100 amp breaker feeding code#

If the run is extra long, use a radio or communicate through phones/smartphones. One should be the feeder, the other the puller. Work in coordination with another person.Choose only the ones that are designed for pulling polymer coated conductors. Use the most appropriate wire-pulling lubricant if you’re encountering too much resistance.Here’s a helpful video explaining how you can check and troubleshoot a subpanel feeder wire that’s located underground:

#150 amp panel with 100 amp breaker feeding how to#

You may want to brush up on how to install a subpanel in a garage for this. Ultimately, routing and running the wire is a wholly separate topic, which may even require you to dive into trenching, conduit laying, and sub-panel mounting. An average 220v sub panel wiring diagram will confirm if the rods are needed or not. Moreover, take note that you need to install one or two grounding rods if the subpanel is placed in a structure separate from the one housing the main panel. The same goes if you’re trying to wire a subpanel in a shed located a hundred or more feet away from the main service panel because voltage drop becomes a big factor in such cases. Need to know how to pull the wires for installation, replacement, and upsizing purposes? Assuming you’re doing a rewire or want to install sub panel in detached garage, learning these things is necessary. If the feeder wires are located underground and you’re having issues with them, you can do some diagnosing on the main panel and subpanel using a multimeter. Make sure your wires are properly set up.ĭouble-check the wiring run that you will need to do to accommodate the feed in your electrical sub panel wiring diagram. For example, if the panel uses 50 amps of adjusted load, then the breaker should be rated for that ampacity or more.ģ.

Remember: you can use any sub feed panel size as long as its current rating is less than or equal to the size of the breaker feeding it.

That would require a 4-gauge copper or 2-gauge aluminum.

The same goes if you’re trying to wire a 100 amp sub panel from a 200 amp main panel and feed it with a 100A breaker.

If you’re settling for 60A as a feeder, make sure you size the cable for that or, to be exact, use the required 6-gauge copper wire or 4-gauge aluminum wire.

It would have to be the same size or larger. The main breaker in the garage is just for a disconnect. The breaker in your house panel determines the circuit size. And that is based on your panel accepting them. You might be able to add a main in your sub panel and by using quad and tandem breakers, get it all to fit, but you will be maxed out for space. If it was me, I would replace the panel with something like I linked above in post #2. You could take another 90 or 100 amp breaker and install it in you sub panel and use it as a main by back feeding it. With that size wire, the maximum circuit breaker feeding your garage could only be 90 amp.

Sounds like you have more than that if you only have 2 spaces left. If you don't have a main disconnect, you would have to be able to shut off all power out there with a maximum of six throws. Sounds like someone installed a main lug. The simplest way is to use a main breaker panel.

You need a disconnecting means out in that detached garage.

#150 amp panel with 100 amp breaker feeding code#

Sounds like you might have a code violation.