![]() If circuit conductors are spliced within a box or terminated on equipment within or supported by a box, all wire-type equipment grounding conductor(s) associated with any of those circuit conductors shall be connected within the box or to the box in accordance with 250.8 and 250.148(A) through ( D) 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.Ģ50.148 Continuity of Equipment Grounding Conductors and Attachment in 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. 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. Connections and splices shall be made in accordance with 110.14(B) except that insulation shall not be required. 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). Once there, click on their link to free access to the 2020 NEC ® edition of NFPA 70.Ģ50.148 Continuity and Attachment of Equipment Grounding Conductors to Boxes. See the actual NEC ® text at NFPA.ORG for the complete code section. A public comment made it clear that it was overkill to require every single equipment grounding conductor in an enclosure to be tied together with others from a particular circuit that happen to be spliced inside the box.īelow is a preview of the NEC ®. The remaining subsections were slightly reworded to improve usability.Ī proposal was accepted at the first draft meeting but reversed at the second draft meeting that would have required all equipment grounding conductors within a box to be spliced together even if they were just passing through the box without a splice. In a plastic box, continuity is maintained between the equipment grounding conductors by joining them together inside the box rather than connecting them “to” the box. Some boxes are plastic and continuity to a plastic box cannot be maintained. This small change was needed since not all boxes are metal or provide continuity. ![]() The section title was changed from Continuity and Attachment of Equipment Grounding Conductors to Boxes to Continuity of Equipment Grounding Conductors and Attachment in Boxes. In the 2020 NEC ®, this section was revised for clarity. Some other things u need to consider include the load of the back house and the load u will have in the shop.Code Change Summary: Revised code language clarifies the continuity of equipment grounding conductors and attachment in boxes. If 3-wire, then its a no go because 3-wire feeders are no longer allowed as of 2008 NEC. U would most likely need new wire and the existing one would have to be abandoned.īut before u consider this, is the existing feed 3-wire or 4-wire. *The wire needs to be protected from physical damage (ie conduit). *The conductors need to remain outside except where they enter structure *First, u would need either a disconnect or a panel with a main breaker on the outside of the shop and the wire needs to be rated for the ampacity of the OCPD. It would probably qualify as an outside feeder tap under 240.21(b)(5) Is it possible to have an electrician cut in near the new shop and put in an underground junction box so I can pull 100 amps from that run? It's the weekend so I can't talk to one and I want to figure out how I am going to do this. The line is approximately where I believe the conduit runs. The upper left side is an open steel pole barn with a 60 amp panel. The right side shows the main house and the lower left side is the guest house. In the image, the century barn that I am converting to a shop is in the middle. The house at the back doesn't need 200 amps but the previous owner liked overkill. The 200 amp that goes to the back house is run with 3/0 copper in 2" PVC conduit and runs right past where I need power for my shop. There is one meter and two feeds at the main house with 200 amps each. On our property, we have a main house as well as a guest house (which we used to rent out) at the back of the property. Money is tight so I am thinking about something. I am building my shop and electrical is one of the next things on my todo list.
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