Bus Bars

Bus bars in electrical power distribution refer to thick strips of copper or aluminum that conduct electricity within a switchboard, distribution board, substation, or other electrical apparatus.

The size of bus bars is important in determining the maximum amount of current that can be safely carried. Bus bars can have a cross-sectional area of as little as 10 mm˛ but electrical substations may use metal tubes of 50 mm in diameter (1,000 mm˛) or more as bus bars.

Bus bars are typically either flat strips or hollow tubes as these shapes allow heat to dissipate more efficiently due to their high surface area to cross-sectional area ratio. The skin effect makes AC bus bars more than about 8 mm (1/3 in) thick inefficient, so hollow or flat shapes are prevalent in higher current applications. A hollow section has higher stiffness than a solid rod, which allows a greater span between bus bar supports in outdoor switchyards.

For very heavy currents in electrical apparatus, and for heavy currents distributed through a building, bus bar can be used. Each live conductor of such a system is a rigid piece of copper or aluminum, usually in flat bars (but sometimes as tubing or other shapes). Open bus bars are never used in publicly accessible areas, although they are used in manufacturing plants and power company switch yards to gain the benefit of air cooling. A variation is to use heavy cables, especially where it is desirable to transpose or "roll" phases.

 
Add Your Company to this Product Category!



New Search

RFQ
Select All

Bus Bars

Electric Power Accessories Corporation EPAC

Electrical Power Products

Hubbell Power Systems

M.G.B. Electric Inc.

MP Husky

MP Husky

ROMAC

Are you a supplier not yet listed on our site? Discover what many of your competitors already know about including product information on The Electricity Forum! For more information, contact: Barbara at forum@capital.net or Christine at christine@electricityforum.com

Subscription

 
Training Courses

Low Voltage Arc Flash-Electrical Safety Training Workshop

  • September 9, 2014 - Mississauga, ON
  • September 11, 2014 - Winnipeg, MB
  • September 12, 2014 - Saskatoon, SK
  • September 15, 2014 - Edmonton, AB
  • September 17, 2014 - Richmond, BC

2-Day LV-HV Arc Flash Electrical Safety Workshop

  • September 9-10, 2014 - Mississauga, ON
  • September 15-16, 2014 - Edmonton, AB
  • September 17-18, 2014 - Richmond, BC

MV/HV Arc Flash/Electrical Safety Training Workshop

  • September 10, 2014 - Mississauga, ON
  • September 16, 2014 - Edmonton, AB
  • September 18, 2014 - Richmond, BC

Electrical Generators & Backup Emergency Power Systems

  • September 22-23, 2014 - St. Johns, NL
  • September 24-25, 2014 - Mississauga, ON
  • September 29-30, 2014 - Winnipeg, MB
  • October 1-2, 2014 - Edmonton, AB

Fire Alarm and Life Safety Systems

  • October 6-7, 2014 - Mississauga, ON
  • October 8-9, 2014 - Calgary, AB
  • October 14-15, 2014 - Richmond, BC
  • October 16-17, 2014 - Winnipeg, MB

Ontario Electrical Safety Code Training

  • October 9-10, 2014 - Mississauga, ON

Power System Design Engineering Course

  • October 14-15, 2014 - Mississauga, ON
  • October 16-17, 2014 - Edmonton, AB
  • October 20-21, 2014 - Richmond, BC

LV-MV Electrical Grounding for Industrial Power Systems

  • October 16-17, 2014 - Richmond, BC
  • October 20-21, 2014 - Edmonton, AB
  • October 27-28, 2014 - Mississauga, ON
  • November 3-4, 2014 - St. Johns, NL
  • November 17-18, 2014 - Saskatoon, SK
  • November 19-20, 2014 - Winnipeg, MB

Edmonton Electrical Grounding Week

  • October 20-24, 2014 - Edmonton, AB

High Voltage Electrical Grounding

  • October 22, 2014 - Edmonton, AB
  • October 29, 2014 - Mississauga, ON
  • November 5, 2014 - St. Johns, NL

Electrical Grounding For Oil & Gas Applications

  • October 23-24, 2014 - Edmonton, AB
  • November 6-7, 2014 - St. Johns, NL

Toronto Electrical Grounding Week

  • October 27-31, 2014 - Mississauga, ON

Edmonton Electric Motor Week

  • October 27-31, 2014 - Edmonton, AB

Industrial Electric Motor Management

  • October 27-28, 2014 - Edmonton, AB
  • November 17-18, 2014 - Mississauga, ON

VFD and Electric Motor Control Training

  • October 29-30, 2014 - Edmonton, AB
  • November 19-20, 2014 - Mississauga, ON

Telecommunications Electrical Grounding and Bonding

  • October 30-31, 2014 - Mississauga, ON

Industrial Electric Motor Testing

  • October 31, 2014 - Edmonton, AB
  • November 21, 2014 - Mississauga, ON

St. Johns Electrical Grounding Week

  • November 3-7, 2014 - St. Johns, NL

Power System Protection Engineering Course

  • November 13-14, 2014 - Mississauga, ON
  • November 17-18, 2014 - Richmond, BC
  • November 19-20, 2014 - Edmonton, AB

Toronto Electric Motor Week

  • November 17-21, 2014 - Mississauga, ON

Power System Modeling and Calculations Engineering Course

  • December 4-5, 2014 - Mississauga, ON
  • December 8-9, 2014 - Richmond, BC
  • December 10-11, 2014 - Edmonton, AB
 
Affiliates
 
Featured Product

Large Stocking Distributor Specializing in Instrument Transformers and Metering Components

Spectrum Industries, Inc.
Spectrum Industries is an Instrument Transformer electrical distributor and contract manufacturer located in Peabody, Massachusetts.
more...
 
Advertisement
Sign Up Today and Receive Our FREE E- Newsletter

E-newsletter service - Exciting industry trends, technical developments, product information, forums and electrical training courses.