When wiring electrical devices yourself, it is extremely important to use the proper size wire for the amount of current that the device will draw. Below ia a quick guide of what size wire to use for the size of the current draw of the device.

Important: This is a general guide, never exceed 80% of the amphere rating. For Example: If the circuit is likely to draw 15 amps, you will need to install a 20 amp circuit.

Note: If your wire run is over 300ft, you will need to consider voltage drop in your circuit.

Wire Size / AWG.	Aluminum Wire Max Current	Copper Wire Max Current
0000 gauge	200 amps	253 amps
000 gauge	175 amps	214 amps
00 gauge	150 amps	186 amps
0 gauge	125 amps	163 amps
2 gauge	100 amps	119 amps
4 gauge	60 amps	89 amps
6 gauge	40 amps	65 amps
8 gauge	N/A	48 amps
10 gauge	N/A	30 amps
12 gauge	N/A	20 amps
14 gauge	N/A	15 amps

It is important to note that you will not be using aluminum wire to wire receptacles, switches or appliances. These days this really only comes into play with your home service panel.

Conductor Sizes for Service Feeders.

The table below covers the conductor size and type for 120/240 volt, 3 Wire, Single-Phase home services and feeders.

Copper	Aluminum	Service Amps
4g	2g	100
3g	1g	110
2g	1/0	125
1g	2/0	150
1/0	3/0	175
2/0	4/0	200
3/0	250	225
4/0	300	250
250	350	300
350	500	350
400	600	400

If you are having problems, Play it Safe.
Make sure you check the regulations in the National Electrical Code and your local codes. If you are still unsure of how to properly wire the circuit you are working on, you will need to contact a qualified electrician in your area. You can also ask questions in our forum.

Related Resources:

National Electrical Code Handbook 2008

2008 National Electrical Codebook

Stallcup's Illustrated Code Changes, 2008 Edition

The Complete Guide to Home Wiring (Black and Decker Complete Guides Series)

Wiring Simplified

Guide to Using the National Electrical Code

Residential Remodeling and Repair Professional Reference

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Disclaimer: You understand that you are personally responsible for your own wiring, and that you're wiring should conform to the National Electrical code. The information provided is general installation advice. We make no claims about the completeness or the accuracy of the information as it may apply to an infinite amount of field conditions. It is the responsibility of the person or persons using this information to check with all concerned parties, owners and local authorities, etc. before doing an installation. Users of this information agree to hold Wireityourself.com or any of its agents harmless form liabilities of any kind relating to the use of this information. You also agree to the terms set forth in our terms and conditions.