can i use electrical box knockout romex BX clamps are not suitable for Romex. Replace them with proper clamps. I know about the clamps. I replace the existing bx clamp with the kind that comes with a new metal .
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The correct thing to use is not a grommet, but a NM clamp, as the latter grabs the cable's jacket and strain-relieves it to the box. They are available in a few different types (some are metal, others are plastic), and install into a .
My opinion is No, if you are using the romex clamps with the box UNLESS the manufacturer says its OK. However, I couldn't find anything in the code myself. If I was going . Romex can be put into the small openings with the built in clamps if they exist. If not use a Romex connector into the round knockout. BX or MC need a BX or MC connector . It seems to me the cleanest, simplest, and time saving way to install NM cables into a surface mount load-center is to come through the back of the box, using one chase nipple or romex connector to protect the cables from . It is recommended but not required that you use a plastic electrical box when you have Romex (or NM) cables leading in or out of the box. The electrical code does not require that you use NM cable with plastic boxes.
BX clamps are not suitable for Romex. Replace them with proper clamps. I know about the clamps. I replace the existing bx clamp with the kind that comes with a new metal . If you're working with a 3/4" or larger knockout, you can get 3 12/2 or 12/3 NM cables into it. You just need a cable clamp that's listed/rated for that many cables; fortunately, .
Yes, it's done all the time for outside lights, receptacles, etc. As long as the Romex lands in a box attached to the building. You can't have Romex outdoors, even in conduit. But . All had to be carved or knocked out with screwdriver and hammer. None had any directions for use. NM cable needs to be clamped to the box, and secured within 12" of the .
Nonmetallic, or NM, cable (commonly known by the brand name Romex) must be secured to electrical boxes at the point where the cable enters the box. This code requirement is an important safety feature that protects the wiring .
The correct thing to use is not a grommet, but a NM clamp, as the latter grabs the cable's jacket and strain-relieves it to the box. They are available in a few different types (some are metal, others are plastic), and install into a standard 1/2" knockout, either using a locknut (for metal and some plastic types), or simply by snapping into . I am adding a 14-50 outlet in the garage. Running NM-B 6/3 Romex to existing breaker box. There is room for a 50AMP 240 breaker. I have 200A single phase service. Sheetrock above box. I can drill a hole in the studs above the breaker box and feed wire into breaker box from attic. After looking at the comments, the real problem isn't the knockout, it's a clamp that will work with access only to the inside of the box. Luckily, this is a solved problem. There are plastic push-in NM connectors made to install inside the box, such as the Raco Insider:
My opinion is No, if you are using the romex clamps with the box UNLESS the manufacturer says its OK. However, I couldn't find anything in the code myself. If I was going to bring 3 wires in the top I would use connectors. Romex can be put into the small openings with the built in clamps if they exist. If not use a Romex connector into the round knockout. BX or MC need a BX or MC connector installed into the round knockout. You need to use the connector that has the information you need on the box they came in. The listing by a NRTL will indicate how many cables my be used. BTW, if the connectors are not listed, the inspector may not approve the installation. It seems to me the cleanest, simplest, and time saving way to install NM cables into a surface mount load-center is to come through the back of the box, using one chase nipple or romex connector to protect the cables from sharp edges.
It is recommended but not required that you use a plastic electrical box when you have Romex (or NM) cables leading in or out of the box. The electrical code does not require that you use NM cable with plastic boxes. What is the NEC compliant method for plugging an unused knockout hole where a conduit connector used to be? I see different types - the pop in friction fit, and the mechanical fastener fit with a screw or wing nut. Does the Code call for any particular type? Nonmetallic, or NM, cable (commonly known by the brand name Romex) must be secured to electrical boxes at the point where the cable enters the box. This code requirement is an important safety feature that protects the wiring . The correct thing to use is not a grommet, but a NM clamp, as the latter grabs the cable's jacket and strain-relieves it to the box. They are available in a few different types (some are metal, others are plastic), and install into a standard 1/2" knockout, either using a locknut (for metal and some plastic types), or simply by snapping into .
I am adding a 14-50 outlet in the garage. Running NM-B 6/3 Romex to existing breaker box. There is room for a 50AMP 240 breaker. I have 200A single phase service. Sheetrock above box. I can drill a hole in the studs above the breaker box and feed wire into breaker box from attic. After looking at the comments, the real problem isn't the knockout, it's a clamp that will work with access only to the inside of the box. Luckily, this is a solved problem. There are plastic push-in NM connectors made to install inside the box, such as the Raco Insider:
My opinion is No, if you are using the romex clamps with the box UNLESS the manufacturer says its OK. However, I couldn't find anything in the code myself. If I was going to bring 3 wires in the top I would use connectors. Romex can be put into the small openings with the built in clamps if they exist. If not use a Romex connector into the round knockout. BX or MC need a BX or MC connector installed into the round knockout. You need to use the connector that has the information you need on the box they came in. The listing by a NRTL will indicate how many cables my be used. BTW, if the connectors are not listed, the inspector may not approve the installation. It seems to me the cleanest, simplest, and time saving way to install NM cables into a surface mount load-center is to come through the back of the box, using one chase nipple or romex connector to protect the cables from sharp edges.
It is recommended but not required that you use a plastic electrical box when you have Romex (or NM) cables leading in or out of the box. The electrical code does not require that you use NM cable with plastic boxes.
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