The bare ground wire in the electrical box is supposed to connect to the green screw on that short metal bar. The body of the light fixture is meant to be grounded through the mounting screw that goes into that metal bar.
What does the grounding screw do?
Ground screws replace the need to dig traditional foundations and lay concrete. As the name would suggest, these foundations are screwed into the ground to depths typically between 1.2m and 5.0m using specialist equipment.
Does a plastic electrical box need to be grounded?
Grounding. Plastic boxes are nonconductive, which means they won’t conduct electricity if they’re touched by a live wire. Having a nonconductive box is good in most cases, but in some electrical systems it can create a problem. The nice thing about nonconductive boxes is that they don’t need to be grounded.
Is a grounding screw necessary?
It is not required to ground the mounting plate. That green screw is only there for convenience of grounding a metal fixture with no separate ground wire. With the two wires you described connected together you are good. Rest easy!
What do you do with a ground wire in a plastic junction box?
Plastic boxes cannot be grounded in the same way. But it’s still necessary to bring the equipment-grounding conductor into the enclosure to ground devices such as switches and receptacles. Connect the bare or green wire directly to the green screw on the device.
How does grounding work?
Grounding works by leveraging the negative electrical properties of the ground. The ground on which you walk has a negative electrical charge. Therefore, it’s able to neutralize positively charged electricity. Grounding allows excess electricity to discharge through the ground.
How do you ground an electrical box?
Quote from the video:
Quote from Youtube video: In the box. So this box is grounded all the way back to the panel. Each. These two ground wires here go down and ground the lights.
Do junction boxes need to be grounded?
Junction boxes are there to serve as a place where you can safely keep wires connected. It’s recommended that they should always be grounded, especially for metal junction boxes. Grounding transfers excess electricity towards the ground, where it can be safely dispersed.
What is self grounding receptacle?
Self-grounding outlets are three-prong outlets that automatically ground to the outlet metal box they are attached to via the mounting screws on the outlet assembly, or via a green pigtail wire from the outlet assembly that is screwed to the metal outlet box.
Do junction boxes need to be secured?
Securing Cables
Article 334.30 states that cables coming out of the junction boxes should be secured within 12 inches of the box in all boxes equipped with cable clamps. These cable clamps are not to be removed. 314.17(C) states that cables must be secured to the receptacle box.
How do you secure a junction box?
Quote from the video:
Quote from Youtube video: And i just start to drive the screws. So here's the second screw. Here. That's it so after you attach it with these two screws here just make sure it doesn't go by just pressing here.
How far from a box must Romex be secured?
Article 336-18 stated that cable must be secured in place at intervals not exceeding 4.5 feet (1.37 m) and within 12 inches (305 mm) from every cabinet, box, or fitting. In the 1999 NEC1, a change was made to the temporary wiring section.
Do plastic electrical boxes need clamps?
Single plastic boxes do not require internal cable clamps, but the cable must be stapled within 8 in. of the box. Larger plastic boxes are required to have built-in cable clamps and the cable must be stapled within 12 in. of the box.
How do you wire a plastic electrical box?
Quote from the video:
Quote from Youtube video: You're gonna push it slide it back. Until it hits those two little plastic measuring pieces on the side of the box. So you're just sliding it back until it hits those.
Do you break tabs off plastic electrical boxes?
Fiber boxes often have knockout ports with no clamps anyway. On non-metallic single gang boxes 2 1/2 x 4, the cable does not need to be clamped if it is secured within 8 inches of the outside of the box (NEC 314.17(C) Exception). Therefor, on those, if the tab breaks off, no issue.
