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
Make sure not to miss these Resources for: How-To-Videos
Browse other questions about this topic:
Wiring Methods Circuit Breaker, Electrical, wire
Or Ask Dave a Question
Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.