Plastic Versus Metal Junction Box - Electrical - Contractor Talk

Plastic Versus Metal Junction Box

 
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Old 09-30-2018, 07:36 PM   #1
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Plastic Versus Metal Junction Box


Is plastic any safer than metal?

Three wire capped connection in an attic space, if that would matter...
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Old 09-30-2018, 07:48 PM   #2
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Re: Plastic Versus Metal Junction Box


Properly installed, it's six of one, half-dozen of the other.

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Old 09-30-2018, 07:52 PM   #3
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Re: Plastic Versus Metal Junction Box


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Originally Posted by 480sparky View Post
Properly installed, it's six of one, half-dozen of the other.
Lets just say a cap drops, live current makes contact with metal. Is this a problem?
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Old 09-30-2018, 08:01 PM   #4
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Re: Plastic Versus Metal Junction Box


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Originally Posted by artinall View Post
Lets just say a cap drops, live current makes contact with metal. Is this a problem?
A properly installed metal box will be grounded.
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Old 09-30-2018, 08:03 PM   #5
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Re: Plastic Versus Metal Junction Box


That's why, being a lazy bum, I prefer plastic. Don't have to ground it. :
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Old 09-30-2018, 08:10 PM   #6
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Re: Plastic Versus Metal Junction Box


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That's why, being a lazy bum, I prefer plastic. Don't have to ground it. :
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Old 09-30-2018, 09:39 PM   #7
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Re: Plastic Versus Metal Junction Box


Cute, but that has nothing to do with grounding the box.
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Old 09-30-2018, 09:42 PM   #8
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Re: Plastic Versus Metal Junction Box


Quote:
Originally Posted by artinall View Post
Is plastic any safer than metal?

Three wire capped connection in an attic space, if that would matter...

what kind of wire you dealing with?
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Old 10-01-2018, 07:40 AM   #9
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Re: Plastic Versus Metal Junction Box


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Originally Posted by Tinstaafl View Post
That's why, being a lazy bum, I prefer plastic. Don't have to ground it. :
In Canada they all have grounds, with a bond strip to the device screw:

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Old 10-01-2018, 10:37 AM   #10
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Re: Plastic Versus Metal Junction Box


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what kind of wire you dealing with?
romax 3 wire. don't have the gauge. assume is shielded.

off-white and more recent yellow. how's that for being green with electric? maybe spoken like more of a painter?
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Old 10-01-2018, 10:38 AM   #11
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Re: Plastic Versus Metal Junction Box


isn't there another option. not plastic but a fiberglass of sorts? greyish...don't see it any more around here much anymore.
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Old 10-01-2018, 01:57 PM   #12
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Re: Plastic Versus Metal Junction Box


Shielded NM?
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Old 10-02-2018, 02:44 AM   #13
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Re: Plastic Versus Metal Junction Box


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A properly installed metal box will be grounded.
So a fiberglass or plastic box would be "safer" in the event live current comes in contact with the inner box? They may melt but not burn?

What about if live current comes in contact with wood studs or fiberglass insulation. Is this a danger?
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Old 10-02-2018, 05:33 AM   #14
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Re: Plastic Versus Metal Junction Box


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Originally Posted by artinall View Post
So a fiberglass or plastic box would be "safer" in the event live current comes in contact with the inner box? They may melt but not burn?

What about if live current comes in contact with wood studs or fiberglass insulation. Is this a danger?
I sincerely hope you are not doing any electrical work yourself
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Old 10-02-2018, 06:55 AM   #15
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Re: Plastic Versus Metal Junction Box


Metal boxes for me , the plastic ones are flimsy. I donít like how they move when plugging in a cord. Screws donít feel right when installing fixtures and so on. The old fiberglass type ones break ,when working around them
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Old 10-02-2018, 09:20 AM   #16
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Re: Plastic Versus Metal Junction Box


They were Bakelite I believe, not fiberglass
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Old 10-02-2018, 12:10 PM   #17
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Re: Plastic Versus Metal Junction Box


I take a very simple approach to this.


If you are using metal conduit or metal cable, metal boxes are the way to go.
I have seen some plastic boxes with KO's in them, but its far from an everyday item.


Romex/NM/UG - I use plastic.
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Old 10-02-2018, 02:24 PM   #18
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Re: Plastic Versus Metal Junction Box


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I sincerely hope you are not doing any electrical work yourself
Was asking about what type of external 'agent' must be present to cause fire, in the event it goes live exposed.
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Old 10-02-2018, 02:57 PM   #19
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Re: Plastic Versus Metal Junction Box


Quote:
Originally Posted by artinall View Post
Was asking about what type of external 'agent' must be present to cause fire, in the event it goes live exposed.
You need three things to start a fire.
1. Fuel
2. Oxygen
3. Source of ignition
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Old 10-02-2018, 03:58 PM   #20
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Re: Plastic Versus Metal Junction Box


Quote:
Originally Posted by artinall View Post
Quote:
Originally Posted by rrk View Post
I sincerely hope you are not doing any electrical work yourself <img src="http://img.contractortalk.com/smilies/blink.gif" border="0" alt="" title="Blink" class="inlineimg" /> <img src="http://img.contractortalk.com/smilies/blink.gif" border="0" alt="" title="Blink" class="inlineimg" />
Was asking about what type of external 'agent' must be present to cause fire, in the event it goes live exposed.
Like I said

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