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Old 05-18-2008, 11:49 AM   #1
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Will splice cause voltage drop?


I'm about 10 feet short on my 200 foot run of #6 aluminum wire feeding a subpanel. I only need 25 amps but I'm worried that if I splice on the 10 feet that I need that I'll have too much voltage drop.

Any need for worry? How is the best way to splice, with copper or stick with aluminum?
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Old 05-18-2008, 01:25 PM   #2
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Will splice cause voltage drop?


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I'm about 10 feet short on my 200 foot run of #6 aluminum wire feeding a subpanel. I only need 25 amps but I'm worried that if I splice on the 10 feet that I need that I'll have too much voltage drop.

Any need for worry? How is the best way to splice, with copper or stick with aluminum?
The voltage drop due to a splice should be negligible if done correctly.

Use a splicing means that is compatible with AL conductors.
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Old 05-18-2008, 03:01 PM   #3
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Will splice cause voltage drop?


whatever you do do NOT use disimilar materials. IF you have copper stay copper, or alum to alum
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Old 05-18-2008, 03:31 PM   #4
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Will splice cause voltage drop?


unless this is underground, direct burial, the splice must be in a junction box as well.
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Old 05-18-2008, 04:31 PM   #5
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Will splice cause voltage drop?


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unless this is underground, direct burial, the splice must be in a junction box as well.
And it must remain accessible. You can't bury a junction box inside a wall.
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Old 05-18-2008, 05:12 PM   #6
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Will splice cause voltage drop?


I agree with nap and joed both.

If this is direct burial cable you can get a direct burial splice kit for it.

If it is conduit you MUST have the splice accessible in a junction box. You CANNOT splice inside conduit
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Old 05-19-2008, 07:09 PM   #7
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Will splice cause voltage drop?


Thanks guys - very helpful!
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