Cable Ratings

6 comments

Rate

Anonymous Poster	Cable Ratings 06/12/2009 6:20 AM
	How to calculate the rating and size of cable?
	Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Cable size 06/12/2009 6:23 AM
	Use British Standard 7671, like all the others that have asked. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
	Reply

Anonymous Poster	#2 Re: Cable size 06/12/2009 6:29 AM
	I require the formula for calculting the rating and size of cable.
	Reply

PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#3 In reply to #2 Re: Cable size 06/12/2009 6:36 AM
	The first Guest is looking for BS7671. Teamwork makes for a better search. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
	Reply

sb Guru Join Date: Mar 2007 Posts: 2550 Good Answers: 103	#4 Re: Cable size 06/12/2009 6:38 AM
	cable size = f(conductor diameter, current carrying capacity,resistivity, conductor thermal conductivity, insulation thickness, insulation thermal conductivity, insulation maximum temperature(class), ....) is it worth it? __________________ Fantastic ideas for a Fantastic World, I make the illogical logical.They put me in cars,they put me in yer tv.They put me in stereos and those little radios you stick in your ears.They even put me in watches, they have teeny gremlins for your watches
	Reply

dbt Associate Join Date: Sep 2008 Posts: 31	#5 Re: Cable size 06/12/2009 7:55 AM
	Hi, I give you a practical tip: for a short distance (<500m) the current rate should be 2A/mm2. for longer distance, it should be less than 2 (1-1,5). for VSD, it should be 1 (or less) depend on each application. for very short distance (some metter) you can increase the number but should not exceed 7A/mm2. Remember: this tip apply to Copper cable only. for Alumin cable, the number should devide 3 or 4. Regards
	Reply

nesubra Guru Join Date: Nov 2006 Posts: 729 Good Answers: 2	#6 Re: Cable size 06/12/2009 8:41 AM
	why do we have to repeat refer earlier threads.u will find a lot of info if u refer to earlier threads __________________ To avoid crticism do nothing,say nothing,be nothing
	Reply

Copy to Clipboard

Anonymous Poster (1); dbt (1); nesubra (1); PWSlack (2); sb (1)

You might be interested in: Cable Laying Services, Cable Assemblies, Cable Trays

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (93 right now) Show Members