Need help understanding upcoming apprentice competition

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JerielBrooks

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I understand the plugs switches and all. But there’s 2 circuits going to the time clock then the motor and then to what ever jm is? I have no legend. Thanks for you help understanding this part of it.
 
JerielBrooks said:
I understand the plugs switches and all. But there’s 2 circuits going to the time clock then the motor and then to what ever jm is? I have no legend. Thanks for you help understanding this part of it.
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i have no idea what your question is

but i do know that some loads being controlled through a time clock are also being controlled through a photo eye

time clock loads are often run through a contactor that the time clock is controlling
 
Here’s More info sorry didn’t post drawing. No legend though

Here’s More info sorry didn’t post drawing. No legend though

If you can PM me. It won’t let me attach the picture here
 

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Jeriel brooks

Jeriel brooks

jumper said:
I do not understand your question. Can you describe it better? JM?
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Hello could I please email you the drawing I’m talking about? You can’t see it well in the attachment I sent.
 
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heres the problem

heres the problem

That is all I have no legend. I have competition in company tmrw. I think I have the 3 and 4 ways down but I don’t understand wiring for the time clock,m, and jm whatever that is.
Also it shows a 12/2 feeding a plug then from there a 12/3 feeding another plug that shows as being split wired. Which I’m pretty sure is impossible unless I ran 2 12/3 Romex to the 1st plug. Thank you!!
 
Before we start, let me tell you that I am a student just learning right now. you may be more advanced than I am. Probably are.

But..will give it a shot..
Ok, if you look at second picture… switches are a 4 way circuit, controlling both lights from the look of things. So, you have power from meter through first junction to junction box 1. this is tapped for switch 1, but also runs to junction two, feeding the outlets.
Three way switch runs from switch one(3 way), through switch 2 (4 way) to switch 3(three way) and back to switch 1, but the third line, that becomes live based upon the switch positions, is running back and tapped at junction two for light two, and then runs back up through switch 1 for light 1… Neutral and ground supplied by the junction boxes for the lights.



Of course, since you show from picture three, that the feed from panel to junction 1 is from breakers 1 and 3, we can assume that we have 5 wires leaving panel box to junction 1, one live and neutral for outlets and one live and neutral for lights…


the PE at light 1 has me thrown unless that is a light sensor… or motion sensor.. still learning so I may not have accounted for it yet…


Since I have not yet gotten used to reading these types of plans, will assume the other circuit is a 240 circuit to the motor, with a timer circuit feeding through to the JM, whiich I am assuming as a variation of a 3 way USA circuit.. where JM is some sort of a cutoff or emergency stop box… but the power circuit is actually run from the timer –TC.. to the motor, but again, I can be totally off base here as only just started learning about blueprint codes and am used to UK symbols more than US symbols.


So, hopefully, I can learn as much as you do from this… just looking at how I would run wires for these two circuits…
 
JerielBrooks said:
That is all I have no legend. I have competition in company tmrw. I think I have the 3 and 4 ways down but I don’t understand wiring for the time clock,m, and jm whatever that is.
Also it shows a 12/2 feeding a plug then from there a 12/3 feeding another plug that shows as being split wired. Which I’m pretty sure is impossible unless I ran 2 12/3 Romex to the 1st plug. Thank you!!
Click to expand...

Well, you could not run 12/3 from the first outlet to the second outlet when you ran 12/2 from the junction, so that has to be an error... unless they reversed the two and want an outlet run from the switches as well... like a work lamp on top outlet with the pins broke off for separate lives... but that would have to be at first outlet as feed from junction 2 is all NM cable...

Picture is pretty rough but I would put in NM12/2 from outlet 1 to outlet 2... as NM12/2 is run from Junction 2 to outlet 1...

not sure whatbJM is but as I said, figure a switch of some sort feeding through motor junction to the TC, or wired at motor but needing powered from TC... Would have to see the motor wiring specs to be sure, which you do not have. JM Could be a control panel of some sort controlling the motor... and so the power circuit from panel is to motor, TC is jumped from motor to TC and back, and JM is jumped from motor to JM and back..all wiring on motor...
or it could be like two way lights, where the power is switched from TC, and you have the control relay running from TC to JM and back to motor...

Sorry I cannot be more help...
 
Adamjamma said:
Well, you could not run 12/3 from the first outlet to the second outlet when you ran 12/2 from the junction, so that has to be an error... unless they reversed the two and want an outlet run from the switches as well... like a work lamp on top outlet with the pins broke off for separate lives... but that would have to be at first outlet as feed from junction 2 is all NM cable...

Picture is pretty rough but I would put in NM12/2 from outlet 1 to outlet 2... as NM12/2 is run from Junction 2 to outlet 1...

not sure whatbJM is but as I said, figure a switch of some sort feeding through motor junction to the TC, or wired at motor but needing powered from TC... Would have to see the motor wiring specs to be sure, which you do not have. JM Could be a control panel of some sort controlling the motor... and so the power circuit from panel is to motor, TC is jumped from motor to TC and back, and JM is jumped from motor to JM and back..all wiring on motor...
or it could be like two way lights, where the power is switched from TC, and you have the control relay running from TC to JM and back to motor...

Sorry I cannot be more help...
Click to expand...

thanks man
 
JerielBrooks said:
thanks man
Click to expand...

Dont thank me.. am as confused as you are.. have done loads of work but only under people that knew the job.. always did what they said... so now trying to learn what they knew, since all four are now dead and I never got any testing done or certifications...

And since I did it in three countries, it is even harder for me.. I call three way switches two way, and four way switches three way... and do other silly things as I try to learn...
 
jumper said:
Click on pics to enlarge.

View attachment 21035

View attachment 21036

View attachment 21037
Click to expand...

I'm quoting Jumper here but only for the images. The statement/question is for the OP.

I'm not sure what JM is but M is motor. Since the drawing said "elevator" I'm guessing it's the elevator motor. Not sure it's important to know what JM is other than it is shown to be controlled by the time clock, as well as the motor being controlled by the clock.

The only thing I see as confusing is as you stated, the 12-3 between the receptacles. That's got to be a typo or a typo somewhere else that should show a 12-3 instead of a 12-2. Since one of the images shows circuits 1 & 3 coming from the panel to a JB, I would guess there should be a 12-3 there for a MWBC (mulitwire branch circuit). The JB then feeds the receptacles and switches. I'm guessing the receptacles are one circuit and the lights are the 2nd. Also could be a split wired receptacle and 1/2 of it would have to share a circuit with the lights.

It also appears that circuits 2 & 4 are a 240V or 208V circuit to the TC for the motor & JM.
 
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