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0 · receptacle box clamp requirements
1 · receptacle box cable clamps
2 · electrical cable for plastic box
3 · cable clamps for boxes
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Per Code, a single-gang plastic box for NM cable need not have a cable clamp. If you're working with the blue Carlon boxes, the most common brand in my area, the single-gang boxes have four knockouts, one in each corner. 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 . Some metal boxes have pre-attached clamps for gripping the electrical cable. Other boxes require you to purchase separate clamps, driving up the total cost of the box. Generally, . 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.
You’ll also need to install cable clamps in the metal box. These thread into the box from the outside. Plastic boxes have internal clamps. 2. Run Cables. Bring the cables into the box through the clamps.
Where one or more internal cable clamps, whether factory or field supplied, are present in the box, a single volume allowance in accordance with Table 314.16(B) shall be . NM cable needs to be clamped to the box, and secured within 12" of the box. The exception is that with a single gang box, you can forego clamping to the box if you staple .
My first question is, with this arrangement, how do I satisfy the requirement to clamp cables inside the box? I can’t clamp them anywhere within 12 inches outside the box. . Install a cable clamp for each cable, as needed. Standard plastic electrical boxes do not have knockouts and contain internal cable clamps. Metal boxes usually have internal clamps; if yours does not, install a locknut-type . Most 2 gang and octo boxes have integral clamps to hold the NM cable in place, simply by knocking it loose and the plastic tab puts pressure on the cable to hold it in place . Per Code, a single-gang plastic box for NM cable need not have a cable clamp. If you're working with the blue Carlon boxes, the most common brand in my area, the single-gang boxes have four knockouts, one in each corner.
receptacle box clamp requirements
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. Some metal boxes have pre-attached clamps for gripping the electrical cable. Other boxes require you to purchase separate clamps, driving up the total cost of the box. Generally, do-it-yourself electricians may find metal boxes slightly more . 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.
You’ll also need to install cable clamps in the metal box. These thread into the box from the outside. Plastic boxes have internal clamps. 2. Run Cables. Bring the cables into the box through the clamps. Where one or more internal cable clamps, whether factory or field supplied, are present in the box, a single volume allowance in accordance with Table 314.16(B) shall be made based on the largest conductor present in the box. NM cable needs to be clamped to the box, and secured within 12" of the box. The exception is that with a single gang box, you can forego clamping to the box if you staple within 8". [Distances from memory, check NEC Article 314, I think.] My first question is, with this arrangement, how do I satisfy the requirement to clamp cables inside the box? I can’t clamp them anywhere within 12 inches outside the box. Or maybe they don’t need to be clamped inside the box in this situation?
Install a cable clamp for each cable, as needed. Standard plastic electrical boxes do not have knockouts and contain internal cable clamps. Metal boxes usually have internal clamps; if yours does not, install a locknut-type clamp for each cable.
Most 2 gang and octo boxes have integral clamps to hold the NM cable in place, simply by knocking it loose and the plastic tab puts pressure on the cable to hold it in place relatively secure. Single gang boxes usually just have knock-outs and don't have integral clamps.
Per Code, a single-gang plastic box for NM cable need not have a cable clamp. If you're working with the blue Carlon boxes, the most common brand in my area, the single-gang boxes have four knockouts, one in each corner. 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.
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Some metal boxes have pre-attached clamps for gripping the electrical cable. Other boxes require you to purchase separate clamps, driving up the total cost of the box. Generally, do-it-yourself electricians may find metal boxes slightly more . 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. You’ll also need to install cable clamps in the metal box. These thread into the box from the outside. Plastic boxes have internal clamps. 2. Run Cables. Bring the cables into the box through the clamps.
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Where one or more internal cable clamps, whether factory or field supplied, are present in the box, a single volume allowance in accordance with Table 314.16(B) shall be made based on the largest conductor present in the box. NM cable needs to be clamped to the box, and secured within 12" of the box. The exception is that with a single gang box, you can forego clamping to the box if you staple within 8". [Distances from memory, check NEC Article 314, I think.] My first question is, with this arrangement, how do I satisfy the requirement to clamp cables inside the box? I can’t clamp them anywhere within 12 inches outside the box. Or maybe they don’t need to be clamped inside the box in this situation?
Install a cable clamp for each cable, as needed. Standard plastic electrical boxes do not have knockouts and contain internal cable clamps. Metal boxes usually have internal clamps; if yours does not, install a locknut-type clamp for each cable.
receptacle box cable clamps
electrical cable for plastic box
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does a blue junction box need cable clamps|electrical cable for plastic box