Wiring 240V 60A wiring questions

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  #41  
Old 08-05-19, 06:16 AM
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A saddle bend would do it. HVAC ducts do usually have a bit of play if you give them a shove, so you might be able to make up an inch that way. I'd also slip a bit of pipe insulation between the conduit and the duct so vibration from the HVAC doesn't rattle on the conduit.
 
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  #42  
Old 08-05-19, 03:55 PM
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Happy to report that I managed a 4 point saddle bend after a couple of trials.
 
  #43  
Old 08-08-19, 05:53 PM
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I am trying to find out best way to clamp a 3/4 flex conduit.
The regular (EMT) straps do not fit. But I couldn't find 3/4" Flex strap in hardware store.
 
  #44  
Old 08-09-19, 06:21 AM
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Any strap that physically fits is OK even if it's not marked for flex conduit. I'm just guessing that about a 1" EMT strap would be right.
 
  #45  
Old 08-15-19, 03:33 PM
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I am planning on installing an electrical box in the garage ceiling as a "gateway" to connect emt conduit coming from adjacent utility room to flex to go above garage ceiling to side wall where charger is located.

I am next to a joist and could attach from inside the box. But typical boxes at store s have only small holes close to where drywall woudl be.

I came across this product:
https://www.garvinindustries.com/ele...boxes/52151-ow

Is this my best option? What would a electrician do?
 
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Old 08-16-19, 06:17 AM
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I'd use a standard steel box screwed to the stud. You can drill additional mounting holes if you need to be able to hit the stud. The old work box is OK, but they never will hold as well as one fastened to the stud.
 
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Old 08-17-19, 10:26 AM
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took the advice and went to store. I was hoping to cover it up with a standard 2 gang blank wall plate. But there is no direct fit. I found one round wall plate that works on the octagon shaped model. Would a mud ring help at all? ANy ideas are welcome.


Also, I found some boxes labeled "plenum" (the octagon on the picture) and others are not. Is this something to worry about? Or can I stick any box I wnat into the ceiling?
 
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  #48  
Old 08-17-19, 10:55 AM
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You can use plaster ring and cover or an RS plate will hold the device and be the cover.
 
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Old 08-17-19, 11:07 AM
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So, I could do box on the left
+ mud ring:
https://www.homedepot.com/p/4-in-Squ...-202056971-_-N

+ 2 gang blank cover like this?
https://www.homedepot.com/p/Leviton-...-00W/100357014

Hoping the cover will just about cover my imperfect drywall opening that I am going to cut.

If I understand RS type correctly, it woudl leave my drywall cut exposed
 
  #50  
Old 08-17-19, 11:12 AM
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If you want the drywall cut covered you will need to use the plaster ring and blank.
 
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Old 08-17-19, 11:19 AM
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thanks. How about plenum rated boxes vs not?
 
  #52  
Old 08-17-19, 10:45 PM
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You should not need plenum rated boxes.
 
  #53  
Old 08-18-19, 06:25 AM
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thanks. I am moving on to the last part of my installation where the EMT penetrates the garage ceiling and connect a EMT on the wall between ceiling and charger at a wall.
I have a 3/4" flex in the ceiling of the garage. I am planning on running an exposed EMT on the wall for the short distance between ceiling and charger.

How do I penetrate the ceiling correctly?
 
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Old 08-30-19, 04:52 PM
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I have one last one question as I am trying to join my conduit to the charger.
The charger has a plastic shell with a knock out for 1" conduit. I am running 3/4" conduit. There are a couple of reducers and adapters. What is the appropriate type for this application? I also like to make it water tight with something like this:
https://www.homedepot.com/p/3-4-in-E...6252/100572360
Just in case somebody is spraying water in garage by accident.
 
  #55  
Old 08-30-19, 05:08 PM
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If the one inch knockout is still in place, drill a hole to match the 3/4 conduit you are intending to use.
 
  #56  
Old 08-30-19, 05:41 PM
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I do have the element. But knock-out is integrated with plug that is rounded to match shell. I don't think I could find a flat surface.


page 13 gives an indication
https://www.tesla.com/sites/default/...anua-en-v1.pdf
 
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