whats difference between 7/0.20 and 14/0.20 wire?? installing a security system and get to choose between 7/0.20 and 14/0.20 wire, is there any difference between them besides the price? should i get one over the other?? and if so why??
One has twice the number of strands as the other (i.e. 14 strands of 0.2 wire as opposed to 7). The 14 strand will have a lower resistance/metre than the 7, so for long runs it would be better. However, being a security system I doubt you are dealing with high currents, so voltage drop probably won't be a big issue.
Does the system manual stipulate what size cable should be used?
Is there a substantial difference in price?
Cheers.
Vernon.
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Bite off more than you can chew and then chew like crazy.
I think that means the number of strand times the conductor cross section area. More strands would mean lower resistance over the length and would be better for longer runs.
Edit: Beaten by Vern lol
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