Extending Line supply to a panel.

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Logan2112

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Klein Products
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Journeyman Electrician
There's a project coming up that will require two (200 amp) single phase 240v panels (in a shop) to have their main disconnect locations changed. A new utility side will be ran on the line side but, the existing wire is not long enough to go to the new disconnects from the panels. I do not like the idea of splicing an extension to each. I would much rather pull out the wire, build the new conduit run and pull new wire to the panels. The problem is TIME. This would require a much longer "down time" for the facility to do the switch over. I suppose I could just do one panel at a time and schedule them on different weekends.. Anyway.. Thoughts??
 
petersonra said:
No reason you can't do most of the work upfront
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I was thinking if I splice, then I could build the new install side while leaving the panels in the existing service, but if I was going to pull new wire, that would require taking the panels offline for more than a couple of hours. It would have to be done in one day and there is only me. Also, These panels are in places that you cannot get to the conduit run anymore except over by the disconnects so, I'd have to use the existing conduit and add on to it.
 
" Well-made splices are as reliable as the wire. "

Never had a problem with Thomas and Betts. 3M cold shrink is fast and easy. Not so keen on Polaris taps but I see them used a lot.

If the old main disconnects can be replaced with a junction box you should be able to prefab and cut over pretty quickly.
 
Here are some stupid questions sorry. So, if you are to splice, (I don't have any issue with that) where is splice happening? Going to have a handhole, jbox, or are you going to have in the pipe? If in pipe, how do you intend to comply with NEC requirement that the conduit be complete before introducing the wire into it? And can a splice joint even be pulled though a conduit with bends? (Implications on future changes).
 
Fred B said:
Here are some stupid questions sorry. So, if you are to splice, (I don't have any issue with that) where is splice happening? Going to have a handhole, jbox, or are you going to have in the pipe? If in pipe, how do you intend to comply with NEC requirement that the conduit be complete before introducing the wire into it? And can a splice joint even be pulled though a conduit with bends? (Implications on future changes).
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What is happening is I have to re-locate the main line power coming in to the disconnects that feed these panels in order to install a back-up generator and ATS for each one. I will be short about 40 feet so I would break the conduits up in the ceiling right before they turn down, build a hanger for a J-box and connect there then extend over to the new location. I believe after discussing it with some other guys that splicing will be the option to go with.
 
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