Emt for ground

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Jpflex

Jpflex

Electrician big leagues
Location
Victorville
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Electrician commercial and residential
Hi I have never used the exemption to Not having to run a ground with ungrounded conductors in conduit when using EMT conduit.

I would like to use emt as my equipment ground conductor can I rely on mechanical set screw connectors and lock ring for 120v 20 ampere circuit or should I also bond switch ground terminal to metal box ad metal cover? End of conduit will connect to main ground
 

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A bonding jumper is not required for the switch. Yes EMT can be used as an EGC. Take a look at 250.118.
 
Self-grounding devices will usually have a copper strap in one of the mounting holes.
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I agree

404.9(B) Grounding.
Snap switches, dimmers, and control switches shall be connected to an equipment grounding conductor and shall provide a means to connect metal faceplates to the equipment grounding conductor, whether or not a metal faceplate is installed. Metal faceplates shall be bonded to the equipment grounding conductor. Snap switches, dimmers, control switches, and metal faceplates shall be connected to an equipment grounding conductor using either of the following methods:
  • (1)
    The switch is mounted with metal screws to a metal box or metal cover that is connected to an equipment grounding conductor or to a nonmetallic box with integral means for connecting to an equipment grounding conductor.
  • (2)
    An equipment grounding conductor or equipment bonding jumper is connected to an equipment grounding termination of the snap switch.

Exception No. 1 to (B):
Where no means exists within the enclosure for bonding to the equipment grounding conductor, or where the wiring method does not include or provide an equipment grounding conductor, a snap switch without a connection to an equipment grounding conductor shall be permitted for replacement purposes only. A snap switch wired under the provisions of this exception and located within 2.5 m (8 ft) vertically, or 1.5 m (5 ft) horizontally, of ground or exposed grounded metal objects shall be provided with a faceplate of nonconducting noncombustible material with nonmetallic attachment screws, unless the switch mounting strap or yoke is nonmetallic or the circuit is protected by a ground-fault circuit interrupter.
Exception No. 2 to (B):
Listed kits or listed assemblies shall not be required to be bonded to an equipment grounding conductor if all of the following conditions are met:
  • (1)
    The device is provided with a nonmetallic faceplate, and the device is designed such that no metallic faceplate replaces the one provided.
  • (2)
    The device does not have mounting means to accept other configurations of faceplates.
  • (3)
    The device is equipped with a nonmetallic yoke.
  • (4)
    All parts of the device that are accessible after installation of the faceplate are manufactured of nonmetallic materials.

Exception No. 3 to (B):
A snap switch with integral nonmetallic enclosure complying with 300.15(E) shall be permitted without a bonding connection to an equipment grounding conductor.
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infinity said:
A bonding jumper is not required for the switch. Yes EMT can be used as an EGC. Take a look at 250.118.
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Yes I tried to convince owner but he made me run a ground wire along entire EMT Conduit anyway
 
I also ran a white conductor as it may now be required to run neutrals in switch boxes?
 
electrofelon said:
Does a handy box plate not cover the ears? I guess I just hardly ever use them and probably would cut the ears off anyway.
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Yes the ears must be removed to use a handy box cover plate. We never use them either except on sprinkler valves.
 
Chamuit said:
Really.....?
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Sure was it such an outlandish question? We hear about "I want it done my way" rules here all of the time without any basis. I would disagree with the bold. Just my 2 cents.

Thanks for providing the info. :)

Amendment to 2017 National Electrical Code (NEC)
Section 250.118(4)
Submitted by: 2018 National Electrical Code Committee
ARTICLE 250 Grounding and Bonding
250.118 Types of Equipment Grounding Conductors. The equipment grounding conductor
run with or enclosing the circuit conductors shall be one or more or a combination of the
following:
(4) Electrical metallic tubing with an additional equipment grounding conductor.
Reasons:
This amendment requires that specific wiring methods include an individual equipment-
grounding conductor. This amendment is more restrictive than the NEC, but provides for a
higher degree of equipment grounding safety. The intent of the amendment is to supplement the
low impedance path to ground and to attain reasonable compliance with requirements for the
performance of the fault current path.
Cost Impact: Minimal cost impact.
Cost due to additional grounding conductor.
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