# 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…

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Electrical Panel Wiring and Circuit Breaker Size
Background: Roland, a Handyman from San Antonio
[ad#block]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:

Electrical Wire and Amperage Table

Electrical Junction Boxes
Electrical Code for How Many Wires in Junction Boxes

Electrical Panel Circuit Listing

Electrical Wiring

Electrical Wiring
Home electrical wiring projects with pictures and wiring diagrams.

This link is helpful as a Handyman
Do-It-Yourself Electrical

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Electrical Videos

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## See All My Videos Here!

with my online Video Course:
Basic Home Electrical Wiring by Example

## Dave's Guide to Home Electrical Wiring:

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Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.

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 Wires!

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 that I use to easily Detect 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.

## The Quickest Way to Check for Faulty Electrical Wiring!

The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.

## Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!

The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..

The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.

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