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Wire specs - dummy load
Wire specs - dummy load
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Old 20th May 2020, 03:44 PM   #1
wanders is offline wanders  United States
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Default Wire specs - dummy load

I'm in the process of building a switchable, 4/8 ohm, dummy load device for use in testing audio equipment. My immediate need is to test a set of tube, mono blocks each outputting around 50 watts (20 v into 8 ohm, like 3 amps); but I think I should build the device to accommodate larger units: say tube amps up to 150 watts and SS up to 200 watts.

I have two pairs of 8 ohm and 4 ohm, 100 watt, dummy load type resistors, but I would appreciate advice on what size hook-up wire to use. (I've got some 22 AWG, 600V wire on hand, but I hate to use it up if it would be over-kill.

Thanks.
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Old 20th May 2020, 03:51 PM   #2
Vovk Z is offline Vovk Z  Ukraine
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22 AWG has about 6 Amps rating. For short time tests you can overload wire a bit.
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Last edited by Vovk Z; 20th May 2020 at 04:15 PM.
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Old 20th May 2020, 04:19 PM   #3
JMFahey is offline JMFahey  Argentina
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And itīs not overkill by any means.
Voltage is not an issue, current is near maximum , most peopple would wire it somewhat thicker wire, "just in case".
It does not hurt.
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Old 20th May 2020, 04:46 PM   #4
wanders is offline wanders  United States
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Thanks, guys. Actually, I've still got some older, 600 Volt wire with heavier insulation. 22 AWG claims to be the same, but I'll use the old stuff.
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Old 21st May 2020, 12:54 AM   #5
Speedskater is offline Speedskater  United States
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I might use 12AWG or better yet, four 14AWG wired as a StarQuad with lots of twists.
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Old 21st May 2020, 01:29 AM   #6
rayma is offline rayma  United States
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Quote:
Originally Posted by wanders View Post
Thanks, guys. Actually, I've still got some older, 600 Volt wire with heavier insulation.
22 AWG claims to be the same, but I'll use the old stuff.
Or use wire from old line cords.
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