srt4geezer
Active member
- Joined
- Mar 26, 2012
- Messages
- 39
My 2 post lift motor is a 3 wire & the 220v box has 4 wires. Any guidance would be great. I have the conduit & 10/2 run, just need to terminate at both ends.
Thanks
Thanks
220v question
- Thread starter srt4geezer
- Start date
Steevo
Well-known member
The motor wiring diagram should show two "line" connections and a ground. One each of the "hot" lines (two black wires, or one black and one red) from the double-pole breaker should connect to each of the "line" connections on the motor.
The ground should be connected to the green wire in the 4-wire box, which should go all the way back to the ground buss in the panel. The fourth wire is probably white, which isn't used for a 230v electric motor, so just cap it with a wire nut.
The ground should be connected to the green wire in the 4-wire box, which should go all the way back to the ground buss in the panel. The fourth wire is probably white, which isn't used for a 230v electric motor, so just cap it with a wire nut.
vhol5
Well-known member
You ran 10-2 romex AND conduit? Why?
The 220 box you mention, is that the panelboard?
Steevo steered you right, the neutral (white), isn't used.
The 220 box you mention, is that the panelboard?
Steevo steered you right, the neutral (white), isn't used.
pattenp
Well-known member
You may find that the L1 & L2 wires in the motor box are black and white.
pattenp
Well-known member
If he is using romex and it's exposed where it could be damaged, it should be put in conduit.
sberry
Banned
The conduit wont hurt this, 2 hots and the ground, I even went as far as to put a box on and put welder outlet on this same wire for mig. No cord needed plug right in. A 10 is a size larger than either the hoist or a compact 230 mig needs.
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dave*99
Well-known member
Do I understand you have both a hardwired lift and a receptacle for your MIG welder on the same circuit? I'd check this with a code expert.
sberry
Banned
Yes thats what I have. This is a calculated load, the wire to the lift and the welder are never used at the same time and the circuit is capable of feeding either, the overcurrent protection is good for both. Even have a size wire larger than either needs.
Actually thehoist has cord and plug but added a separate outlet for the welder so each unit does have disconnecting means.
Actually thehoist has cord and plug but added a separate outlet for the welder so each unit does have disconnecting means.
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Charles (in GA)
Well-known member
A car lift runs for all of about 30 to 45 seconds, and then it sits. Why waste a good circuit, especially if it is a long run.
Charles
Charles
sberry
Banned
As I recall I must have had a big duh moment, probably about the first time I figured I had to run a cord every time I wanted to weld on the hoist. With all the ups and downs 80 or 85 ft and once the duh passed about 5 minutes work.
wyliesdiesels
Well-known member
Agreed! Nothing wrong with dual purposing a circuit! What a waste it would be to run a separate circuit for the lift and another circuit for the wire feed welder!
wyliesdiesels
Well-known member
I didn't see it! Only thing mentioned was 10-2 romex!
e-tek
Well-known member
I should do that (outlet on compressor line). Might be easier that having a 30foot extension strung across the shop!
Is Romex okay to use in conduit? I thought it was a no no.
Should get the code book guys, out from behind the woodwork.
This question comes up all the time.
At the risk of angering many (honey, I can't go to bed, someone on the Internet is wrong!), here is my opinion on the matter:
1) Running Romex in Conduit is technically not allowed. Code (and most inspectors) say you should run individual wires made for the purpose in conduit. It is more expensive to use individual wires. There are several theories as to why, the best I know of is that the individual wires must be marked a certain grade. If the individual wires inside Romex aren't marked, it's technically not allowed. I have looked this up in the NEC and it's true. Also, there is an argument that the wires bundled close together will heat up. Some remove the wrapping from Romex and just run the wires. This isn't allowed (again, technically) unless the wires are marked (THHN 90C from memory, that might not be it).
2) Some say that Romex is technically allowed but only in "dry" locations. Inside is considered a dry location. Outside or buried are considered wet locations. I think this is a descent argument.
3) Legal or not, many people run Romex in Conduit. I have run Romex in conduit for my own purposes but never for a customer.
4) It is certainly OK to run Romex in conduit for short runs. A good example of this is between utility boxes, to light fixtures, etc. Runs less that a foot are acceptable by the letter of the NEC.
YMMV, do what you think is right. I haven't seen a good physics argument as to why Romex shouldn't be used in conduit but electricity is dangerous!
pattenp
Well-known member
Okay you need to cite the NEC code section on this. First off the NEC gives direction on how to calculate the size on multiconductor cable or flexible cord for conduit fill percentage. The issue with Romex (NM) is the marking is on the outer sheathing and not the individual conductors meaning you cannot strip off the sheathing completely and use the individual conductors in conduit.
See 2011 NEC 334.15(B). (Exposed Work, Protection from physical damage). NM cable shall be protected by conduit.
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Stuart in MN
Well-known member
You can install Romex in conduit as long as the conduit is sized correctly. There's no NEC violation, although it's possible there are local regulations prohibiting it. However, it is a bear to install and in most cases it's not the best way to go.
"NEC 310.120 All conductor and cables shall be marked..."
The NEC says each conductor needs to be marked. The way I read this, an outer sheath marking alone is not sufficient.
pattenp
Well-known member
310.120(B)(1)(2). The code is not saying that both the sheathing and conductors within the sheathed cable need to be marked. Conductor vs cable are terms to mean single conductor vs multi-conductor assembly. That's why the code list the types. If it's a single conductor the marking is on the surface and if it's a NM cable the marking is on the surface. You're reading more into it than it is.
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wyliesdiesels
Well-known member
Sounds like it!
Charles (in GA)
Well-known member
Indeed, code gives guidance on determining the sq/in of area of cords and cables (multi-conductor) and even says that elliptical cross section cable (such as Romex) are to be considered round and their area based on their major diameter for calculating conduit fill. This is all in Chapter 9 in the back of the book, which is the chapter on conduit and fill.
Its not smart to run Romex in conduit for any length, but it is legit to do so.
Indeed, Romex is not suitable for wet locations, and any conduit underground is a wet location as defined by the code.
Charles
Its not smart to run Romex in conduit for any length, but it is legit to do so.
Indeed, Romex is not suitable for wet locations, and any conduit underground is a wet location as defined by the code.
Charles