Electrical Panel Sizes and Circuit Wiring
We have installed a 100 amp breaker box in a new work shop, what size breakers do I attach the main lines to in the 200amp box…
Electrical Panel Wiring and Circuit Breaker Size
Background: Roland, a Handyman from San Antonio
Question: At our ranch we have a 200amp panel box and we have installed a 100 amp breaker box in a new work shop, what size breakers do I attach the main lines to in the 200amp box?
Thanks for your electrical question Roland.
The rating of the 100 amp panel is just that, it is a maximum amperage rating. So my question to you is what size wire did you install to this 100 amp panel? Did you install wire sized to support a circuit rated at 100 amps? If so then the circuit breaker size must be 100 amps. Keep this in mind: the circuit breaker size is determined by the smallest wire size in that circuit. Ideally the wire sizes should in fact be all the same size unless there is a junction where copper and aluminum wire types are spliced. The other determining factor is the insulation type which is rated for many things including temperature. So I cannot give you an answer unless I know about all the missing information about the wires that were installed.
The Following links will assist you with your electrical question:
Home electrical wiring projects with pictures and wiring diagrams.
This link is helpful as a Handyman
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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
The Safest Way to Test Electrical Devices and Identify Electric Wiring!The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester, [amazon.com], I use for the detection of Standard Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.
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