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Buffalo Phone: 716.531.4875 Denver Phone: 303.800.4725 Fax: 303.600.9726
BD Batteries - Buffalo, New York & Denver, Colorado - Deep Cycle AGM Batteries Delivered Nationwide
Lifeline Batteries, Total Power Batteries, Rock Racing Battery Line, Optima Battery Lines & Sun Xtender Batteries

DC Copper Wire and AC Copper Wire Rules and Guide

BD Batteries recognizes that weekend electricians, and others who are not intimately familiar are usually not adept at the difference between copper wire.

DC Copper wire should be stranded to reduce the resistance and allow flexibility at MUCH larger THICKNESSES. This allows these wires to carry high amperages at lower voltages. BD Batteries chooses to supply it's customers with the highest grade welding wire for DC applications as it is tough, shielded for safety, and designed to carry larger loads.

AC Copper or Aluminum Wire is usually thicker, and can be a single strand as the voltages are much higher than in many DC systems and the frequency modulations (HZ) help to "MOVE" the electricity along these thicker wires. BD Batteries supplies it's clients with UL Listed AC Wire that conforms to Colorado Building Codes.

Back To BD Batteries Wire Available for Purchase

Cable Size

Wire Gauge	Current Capacity Amperage (amps)	Max Voltage
1/0	350	350
2	225	225
4	150	150
6	125	125
8	100	100
10	60	60
12	40	40
14	25	25
16	15	15

Cross reference
of AWG (American Wire Gauge)
sizes to metric (mm)

AWG	mm²	Ohms per km R per KM	Ohms per 10 ft R per 10 ft
16	1.5	13.0	0.039624
14	2.5	8.54	0.02602992
12	4.0	5.4	0.0164592
10	6.0	3.4	0.0103632
8	10	2.2	0.0067056
6	16	1.5	0.004572
4	25	.8	0.0024384
2	35	.5	0.001524
1	50	.4	0.0012192
1/0	55	.31	0.00094488
2/0	70	.25	0.000762
3/0	95	.2	0.0006096
4/0	120	.16	0.00048768

Ohms at 10 feet calculation .003408 x ohms/km

DC resistance

As long as the current density is totally uniform in the conductor, the DC resistance R of a conductor of regular cross section can be computed as

Where:
l is the length of the conductor, measured in meters
A is the cross-sectional area, measured in square meters
p(Greek: rho) is the electrical resitivity (also called specific electrical resistance)
Copper Electrical resistivity (microohm/cm) 1.678

Ohms of resistance in a material can be measured by a multimeter over a wire. Resistance is a measure of the material's ability to oppose the flow of electric current.

For practical reasons, almost any connection to a real conductor will not show perfect current density, or is not totally uniform. However, this formula still provides a good approximation for long thin conductors such as wires.

AC & DC Voltage Drop Over Length of Wire Calculator

The following calculator calculates the voltage drop, and voltage at the end of the wire for American Wire Gauge from 4/0 AWG to 30 AWG, aluminum or copper wire. (Note: System calculates ANY voltage drop, whether safe or not. CONSULT your local, city, state, and national electrical code or your electrician to decide what is legal before building!

Select Copper or Aluminum

Select American Wire Gauge (AWG) Size

Select Voltage

Enter 1-way circuit
length in feet

Enter Load
in amps

Voltage drop

Voltage at load end of circuit

Per Cent voltage drop

Wire cross section in circular mils

Calculate Voltage Drop in Wire

To calculate voltage drop, plug in the values: V = DIR/1000
Where I is the amperage,
R is from the ohms/10' X 100 column left,
and D is the total distance the current travels
(don't forget to add the length of the neutral and hot together - ie: usually double cable length). Design rules in the CEC call for a maximum voltage drop of 6% (7V on 120V circuit).

Cool Wire Tricks

The wire gauge is a logarithmic scale base on the cross sectional area of the wire. Each 3-gauge step in size corresponds to a doubling or halving of the cross sectional area. For example, going from 20 gauge to 17 gauge doubles the cross sectional area (which, by the way, halves the DC resistance).

Battery Systems 101
Battery Chargers Info Battery Inverters Info Lags, Sags, Surges Spikes and Transients	Grid Tie Info Custom Uninterruptable Power Supplies Info Wire Rules and Info

BD Batteries - A Broomfield-Designers Company
Serving the Local Colorado Community 9-5 Mountain & Emergencies P. 303-800-4725 F. 303-600-9726
Serving the Buffalo and the Great Lakes Communities 9-5 Eastern & Emergencies P. 716-531-4875 Mailing Address: 5023 West 120th Ave. #138, Broomfield, CO 80020
Denver Desk inside CMS: 625 East 70th Ave. Denver, CO 80229

NO, WE ARE NOT GOING OUT OF BUSINESS!!!
OUR DENVER WAREHOUSE IS MOVING TO A NEW LOCATION AT THIS TIME.
WE ARE SCHEDULED TO REOPEN THIS BRICK AND MORTAR FACILITY IN EARLY 2011.
IN THE MEAN TIME OUR WEBSITE AND PHONES OPERATE FINE!

We do thank the public for the outreach of concern, and votes of confidence. Our customer support team is seeing guests, operating from a desk inside Colorado Metallurgical Services.
Do call Lorene prior to arrival to ensure she has what you need from storage.

As a consumer warning: unrelated prices on our equipment are coming. Don't be affected.
If you are shopping now, get it done before the end of 2010! Corporate Accounts, Vendors, Installers, Electricians, and others interested in setting up an account.

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BD Batteries
Buffalo, New York
Denver, Colorado
716-531-4875
303-800-4725

BD Batteries, Denver Battery Distributor

Official Battery Distributor for:
Lifeline Battery, Sun Xtender Battery, Total Power Battery, and Rock Racing Batteries.

AGM Batteries, AGM Battery Chargers, Deep Cycle Batteries, DC Fuses, DC Firewall Pass Throughs, DC Diodes, and Special Order Flooded Crown Batteries!

Automotive Battery Directory Broomfield-Designers Custom Database and Website

The information contain on this deep cycle AGM batteries website is deemed reliable, but not guaranteed. Please verify specific information on marine AGM batteries, rv AGM batteries or auto AGM batteries listed here by calling us direct. We are proud to offer the highest quality AGM batteries and hope you will consider using our deep cycle AGM batteries in the near future!