EK001
Member
- Location
- Ontario, Canada
- Occupation
- Certification
Hi Everyone,
I am researching the requirements for prefab homes in the US that use NM cable with connectors. More specifically, we'd like to buy cable whips/harnesses with NM cable and UL Listed connectors as per 550.15 (K). Such harnesses would reduce setup/install times greatly and we may have found a good source for such connectors. My questions on this topic:
I am researching the requirements for prefab homes in the US that use NM cable with connectors. More specifically, we'd like to buy cable whips/harnesses with NM cable and UL Listed connectors as per 550.15 (K). Such harnesses would reduce setup/install times greatly and we may have found a good source for such connectors. My questions on this topic:
- Can a distribution box be used somewhere in the home where one connector can enter and the circuit can be spliced and split into multiple outputs via terminal blocks, etc.? This box may have 1 circuit or multiple circuits but all entry and exits would be through UL Listed connectors.
- If the panel mount connectors on the box are UL recognized instead of listed, does this pose a problem?
- Does this distribution box need to be made of metal or plastic? Why?
- Would these distribution boxes need to be made by the onsite electricians or are they made elsewhere, possibly by the same folks that make the wiring harnesses? Is any special designation needed for the shop that makes these boxes, such as a UL 508A accreditation?
- Does the box need a Type/NEMA enclosure rating?
- My guess is that this box needs to be accessible but can anyone point me to the exact clause in 550 that makes this clear?