How do I determine what wire gauge to use?

  • Thread starter opmal7
  • Start date
  • #1
opmal7
27
0
I have a motor that I am using, and I need to know what gauge wire to use to connect to the motor. I've looked all over online, but haven't found anything that can tell me a formula or anything to use to figure this out.

The motor is 24VDC and draws 50A max, and would be running about 15 mins per hour of product use. The cable length is approx 10 ft. Is there any more information required to determine what gauge wire I should use?
 

Answers and Replies

  • #2
sophiecentaur
Science Advisor
Gold Member
27,727
6,295
There are tables of current handling capacity for a whole range of cable gauges, available. A google search for "Wire Gauge current rating" will yield a load of possible links.
The insulation and proximity to similar cables will have as much relevance as the simple current rating of the wire, though. For instance, drums of extension cable need to be protected from overheating when operated with most of the cable actually on the drum.
It is simpler to buy cable which is rated (on the pack) for the current that you want to use (erring on the large size if there is any doubt). That will enable you feel confident that it will not overheat. Forget about the duty cycle unless there is a serious reason for 'pushing your luck' and cutting down on cost. Just select 50A cable from a catalogue (which I expect will be 10mmsq) and then you won't need to worry. It will be annoyingly expensive but 50A is quite a heavy load (typical Electric Shower Power cable)
 

Suggested for: How do I determine what wire gauge to use?

Replies
1
Views
311
  • Last Post
Replies
13
Views
461
  • Last Post
Replies
28
Views
8K
Replies
13
Views
373
  • Last Post
Replies
3
Views
1K
Replies
11
Views
718
Replies
5
Views
426
  • Last Post
2
Replies
39
Views
1K
Top