Electric drop for auto

[Pangea]

We're getting a used M&R, our electrician installed a ROQ at another shop across town so we trusted his expertise for the drop. Talked to our rep and he informed us that the metal conduit drop they put in wasn't ideal and we should get a rubber one done instead. Wanted to see if anyone has:

1. Used a metal conduit for a drop on an M&R
2. Any amateur electricians that have an idea of how easy it is to replace the metal for maybe a rubber sheath

It's due to drop in about 2 weeks hence the last question. We'll hire a certified electrician but wanted to get an idea on the timeline I guess.

Thanks in advanced.

[3Deep]

Only problem I see with metal is when the wires get very old or you have some naked wires in the conduit that could touch, which you shouldn't, plus the wires are already in there own rubber covering.  Codes have changed over the years and the most important thing is to be up to the correct code for your insurance, so if something did happen your covered.  Back in the days when I use to run electric wire, metal conduit was all we had to use, but that like I said was many years and codes ago LOL

[Jepaul]

Local codes can be finicky with this stuff.

Are you dropping down the center shaft or coming in from the side.

Most likely the reason the electrician ran metal conduit instead of flex is from his ROQ install.  The ROQ runs the press and all flashes off of a single drop.  This can save you quite a bit of money on electrical runs depending on how many flashes but many times it also causes a single drop of 100+ amps at 220v 3 phase. Wires this big can be tough to make the “turn” when running down the center shaft so the electrician probably can metal conduit to junction boxes.  You can’t run rubber from box to box and be up to code.  Although you probably code run flex metal conduit.  Again, codes are finicky.

The m&r rep is probably concerned about the metal drop because it isn’t as easy to move the press should that be required.  3 inches here, 3 inches there, etc.   The m&r single drop is typically small enough that making the “turn” is not an issue so using a signal run of “rubber” from the breaker box to the machine hook up as a single run is not an issue.

1. I’ve 100% seen many hard drops to m&r presses without issues.
2. Replacing what you hand is very easy.  There is just cost involved.

[Binkspot]

Assuming you are dropping from the ceiling you can run the conduit overhead but do the drop with service cord and a strain relief. But that being said I personally don't like SO or SJ type cord and would use a better type of service cord. The press doesn't really need the flexibility but the flashes do in order to move them around. For the press you could do a drop with EMT then trasisson to flexible conduit or seal tight. Most likely the drop was done using conduit all the way due to cost. Most likely the conduit and wire is cheaper then the cord.

[cbjamel]

We're getting a used M&R, our electrician installed a ROQ at another shop across town so we trusted his expertise for the drop. Talked to our rep and he informed us that the metal conduit drop they put in wasn't ideal and we should get a rubber one done instead. Wanted to see if anyone has:

1. Used a metal conduit for a drop on an M&R
2. Any amateur electricians that have an idea of how easy it is to replace the metal for maybe a rubber sheath

It's due to drop in about 2 weeks hence the last question. We'll hire a certified electrician but wanted to get an idea on the timeline I guess.

Thanks in advanced.

they can do it with so cord and a strainrelief box in ceiling pretty easy.
Shane

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