Copper Wire Resistance and Voltage Drop

Copper Wire Resistance and Voltage Drop

AWG stands for "American Wire Gauge" and is a standardized wire gauge system  used in the US since 1857 for diameters of round, nonferrous, electrically conducting wire.  The cross-sectional area of a wire determines it's resistance and current-carrying capacity.  The large the wire diameter, the less resistance it has to the flow of electrons, and the more current it can carry without overheating.  The table below list copper wire resistance for various gauges of copper wire.  These should be used as a rule of thumb as there are other factors that play into the current ratings of wire including ambient temperature, insulation temperature limit, air convection, etc.  You should consult the National Electrical Code (NEC) for specific guidelines. 

AWG Wire Sizes and Resistance

 

 

The diagram below shows many of the common copper wire sizes used when wiring a home.  General ampacity ratings are listed as well but you should consult the tables below for more accurate ampacity ratings.  This illustration is meant to show relative sizes of the common gauges of wire.

 

Common Copper Wire Sizes:

This cable provides the amperage rating for common insulated conductors including RX.  Insulated conductors should have the temp rating and type (i.e. THWN 75ºC) printed on the outside of the cable.  You can then follow the chart below to see how much current you are allowed to put through the conductor.  This table assumes not more than three conductors in a raceway or cable or earth (directly buried) and is based on ambient temperature of 30ºC (86ºF).

 

Why do I need larger gauge wire to carry more current?

The larger the copper wire size the less resistance and hence the more current it can carry without over-heating. Resistance impedes to the flow of electrons and causes a voltage drop across the wire.  You want to avoid voltage drops on your wiring as much as possible because they generate heat and wasted energy.  The calculator below will help determine how much voltage drop you will get with a given copper wire and its associated resistance.

 

USE:

The specific characteristics of this conductor are it is fire retardant, and self-extinguishing. It is recommended for lighting and electricity installations in residential, commercial, and industrial buildings.

 

CONSTRUCTION

1. Flexible bare copper conductor, soft temper, Class 1.
2. PVC/A Insulation 70°C – extruded thermoplastic compound based on PVC, its  specific characteristics are, it is fire retardant and fire self-extinguishing.
3. PVC/A 70°C Insulation – extruded thermoplastic compound based on PVC, with special fire retardant and fire self-extinguishing characteristics. Good finishing characteristics and easy sliding of wires through the electroducts.

CORES

Sections from 0.5 mm² to 10 mm²:
yellow, blue, white, gray, black, green, red, lilac, orange, brown, and greenish-yellow.

Sections from 16 mm² to 240 mm²:
black, blue, green, white and red.

 

INSULLATION COLORS

Section 1.5 mm² to 6 mm²:
Black, blue, green, white, red, yellow, and gray.

Sections 10 mm² to 300 mm²:

Black, blue, green, white, and red.

 

RECOMMENDED INSTALLATION METHODS

In locations of large-scale public traffic as stated in the definitions and methods described in NBR 5410.

APPLICABLE STANDARD

NBR 13248.

MAXIMUM CONDUCTOR TEMPERATURE

• 70°C in permanent regime;
• 100°C in overload regime;
• 160°C in short circuit regime.

INSTALLATION METHOD DETAILS

• Thermally insolated wall
• Apparent electroduct
• Electroduct embedded in brickwork.
• On the insulator.
• Electroduct
• Closed raceway embedded in floor.
• Electroduct in construction space.

MORE INFORMATION

Dados construtivos

 

Spes of SOFT WIRE:

Note 1: Based on a max ambient temperature of 30°C and a max conductor temperature of 70°C

 

 

 

Packaging

Packaging            100 metre
Shrink-wrapped coils

Also available on  1000 metre
Wooden drums

Shipping:
Port: Tianjin, Qingdao, or other ports as per your requireents.

Sea freight:
FOB/C&F/CIF quotation are all available.

 

 

 

1. We have a large production base, and advanced production equipment 
2.  Have an competitive price and high quality
3.  Excellent after-sale service
4.  Attractive design and various styles
5.  Free issue:packaging list,invoice,CD installation
6.  Powerful technology R&D team
7.  Strict quality assurance system and perfect testing means
8.  Advanced process equipment
9.  Painted with powerful antiseptic Anticorrosion material paints
10. Delivery on  time
11. Our roller coaster sales to Middle East,Africa,Russia,Southeast Asia, etc.
12.We have a good reputation in the overseas

 

Contact information

 

Any needs or question, please contact us, we will be more pleasure to service you.

Skype ID: xinyuanyy
Cellphone/WhatsApp/Wechat/ICQ: +86 158 3829 0725

Facebook: xin.yuan.73307

We are looking forward to your inquiry and nice cooperaton.