Why the extra wire?

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  #1  
Old 05-15-20, 02:03 AM
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Why the extra wire?

This is a sketch of just the white common wires that are capped together with 2 pigtails inside a switchbox. I found it odd that there's an EXTRA wire joining the two pigtails together. Why would they wire it like that???
 

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05-15-20, 07:58 AM
Astuff
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Yes, path leads to the same place. Parallel. It's not that it won't work but it is a code violation. NEC must have found that it causes safety issues.
 
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Old 05-15-20, 03:10 AM
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Only reason I can think of is that the whites were not long enough to be joined together in one wirenut.
 
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Old 05-15-20, 05:05 AM
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To many wires for a single wire nut??? Should of used a bigger wire nut.
 
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Old 05-15-20, 05:19 AM
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The extra pigtail shown is unnecessary. Whoever installed it probably lost track of which wires went where.in the jumble of wires and confined space of the box.
 
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Old 05-15-20, 05:39 AM
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Hi, if you are talking about 2 conductors tied together and then going to the other wire it, who knows, makes no sense.
Geo
 
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Old 05-15-20, 05:41 AM
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I'm betting a bigger wire nut was not available and using the pigtails did the job. Don't know if it's considered against code, but I don't see any harm done.
 
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Old 05-15-20, 05:48 AM
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Maybe 2 wires between wire nuts are smaller gauge than other wires in circuit so added to share current.
 
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Old 05-15-20, 06:46 AM
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Whatever the reason it is a mistake. The extra wire is not code compliant as it creates a parallel path for current.
 
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Old 05-15-20, 06:53 AM
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The extra wire is not code compliant as it creates a parallel path for current.
But does not that path lead to the same place?
 
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Old 05-15-20, 07:58 AM
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Yes, path leads to the same place. Parallel. It's not that it won't work but it is a code violation. NEC must have found that it causes safety issues.
 
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Old 05-15-20, 12:59 PM
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What's the maximum number of wires you can pigtail together in one nut? I also need to add two additional braided wires to this bunch when I rewire it.
 
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Old 05-15-20, 01:16 PM
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Depends on brand. Even winged vs. normal can be different so I look at the box. Usually the colors follow something like this:


 

Last edited by Astuff; 05-15-20 at 01:20 PM. Reason: Needed to add some color to this thread.
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Old 05-15-20, 04:27 PM
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Astuff, if the circuit used #14 wire and there were 2 #14 wires between the wire nuts, why isn't this code compliant?
 
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Old 05-15-20, 04:43 PM
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This is from NEC 310.10(H)(1)
Aluminum, copper-clad aluminum, or copper
conductors, for each phase, polarity, neutral, or grounded
circuit shall be permitted to be connected in parallel (electrically
joined at both ends) only in sizes 1/0 AWG and larger
 
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Old 05-15-20, 06:58 PM
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I'm betting a bigger wire nut was not available and using the pigtails did the job.
Each wirenut has 4 wires in it. Without the 2 jumper wires there are only 4 wires to connect. IF those original 4 wires were long enough, they could have been connected with one wirenut. A bigger wirenut would not have been needed.
 
 

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