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Old 01-19-2015, 08:21 PM   #1
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Default Pull boxes need grounded?

so a few of us at my shop are having a discussion about whether or not not pull boxes need to be grounded. Some of them say that as long as it's just a pull box with no splices or terminations it's not needed and others say it doesn't matter, it needs to be grounded. What say you.

Art 250.148 is in question here.

Thanks.
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Old 01-19-2015, 08:23 PM   #2
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Quote:
Originally Posted by icdubois View Post
so a few of us at my shop are having a discussion about whether or not not pull boxes need to be grounded. Some of them say that as long as it's just a pull box with no splices or terminations it's not needed and others say it doesn't matter, it needs to be grounded. What say you.http://www.emotionsanonymous.org/

Art 250.148 is in question here.

Thanks.
I say no splices no ground assuming the box is connected with metal raceway.
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Old 01-19-2015, 08:36 PM   #3
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I agree, no splice no ground.
If I was a gambling man I would say the wording changed in 05, so it was not required to bond the box with the equipment ground if it did not contain a splice
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Old 01-19-2015, 08:52 PM   #4
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IMO, If it's emt, doesn't need to be grounded.


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Old 01-19-2015, 10:17 PM   #5
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Originally Posted by icdubois View Post
so a few of us at my shop are having a discussion about whether or not not pull boxes need to be grounded. Some of them say that as long as it's just a pull box with no splices or terminations it's not needed and others say it doesn't matter, it needs to be grounded. What say you.

Art 250.148 is in question here.

Thanks.
Hopefully, this is not just another useless post but I believe that all metallic components of an electrical system need to be bonded and that bonding would be at ground potential because of connections at the service.
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Old 01-19-2015, 11:48 PM   #6
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Way back the way it was worded was that the equipment grounding conductor had to be bonded to the box. So multiple grounding paths, EMT and the grounding conductor had to be brought together in the box. It is still that way. Now I believe the wording is that if there is no splice in the box you do not need to make that bonding connection.
Years ago if we pulled feeders through a pull box without splice, we would strip back a bit of ground and bug it to the box. Now you don't need to.
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Old 01-19-2015, 11:53 PM   #7
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Forgot to mention if it was PVC you would have to anyway. But the wording was that multiple ground paths had to be bonded together.
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Old 01-20-2015, 12:33 AM   #8
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ARTICLE 314
Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures

314.4 Metal Boxes. Metal boxes shall be grounded and bonded in accordance with Parts I, IV, V, VI, VII, and X of Article 250 as applicable, except as permitted in 250.112(I).





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Old 01-20-2015, 05:23 AM   #9
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I think the wording of the first sentence was added or changed to say "are spliced" a while back. Anyway here is the article from the 2011 NEC handbook.
See the commentary at the end.

250.148 Continuity and Attachment of
Equipment Grounding Conductors to Boxes
Where circuit conductors are spliced within a box, or terminated
on equipment within or supported by a box, any equipment
grounding conductor(s) associated with those circuit
conductors shall be connected within the box or to the box
with devices suitable for the use in accordance with
250.148(A) through (E).
Exception: The equipment grounding conductor permitted
in 250.146(D) shall not be required to be connected to the
other equipment grounding conductors or to the box.
(A) Connections. Connections and splices shall be made
in accordance with 110.14(B) except that insulation shall not
be required.
(B) Grounding Continuity. The arrangement of grounding
connections shall be such that the disconnection or the
removal of a receptacle, luminaire, or other device fed from
the box does not interfere with or interrupt the grounding
continuity.
(C) Metal Boxes. A connection shall be made between the
one or more equipment grounding conductors and a metal
box by means of a grounding screw that shall be used for no
other purpose, equipment listed for grounding, or a listed
grounding device.
(D) Nonmetallic Boxes. One or more equipment grounding
conductors brought into a nonmetallic outlet box shall be
arranged such that a connection can be made to any fitting or
device in that box requiring grounding.
(E) Solder. Connections depending solely on solder shall
not be used.

Where a metal box is used in a metal raceway system and
there is a wire-type equipment grounding conductor installed
in the raceway, 250.148 does not require that the
wire-type equipment grounding conductor be connected to
the box, provided the box is grounded by the metal raceway
and the circuit conductors are not spliced or terminated to
equipment in the metal box. A metal box installed at a point
in a metal conduit or tubing system to provide a point at
which to pull conductors into the raceway system is covered
by this section as long as the conductors are not spliced or
otherwise terminated in the box. In this respect, the box is
treated the same as a metal conduit body such as an L or
T type installed to provide a conductor pull point in a conduit
or tubing system.
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Old 01-20-2015, 05:37 AM   #10
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Quote:
Originally Posted by icdubois View Post
so a few of us at my shop are having a discussion about whether or not not pull boxes need to be grounded. Some of them say that as long as it's just a pull box with no splices or terminations it's not needed and others say it doesn't matter, it needs to be grounded. What say you.

Art 250.148 is in question here.

Thanks.
It's a handbook question Icdubois.

The commentary considers a metal box in a metal raceway a conduit body where to splice or termination is made.

~CS~
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