Can nm-b wire be used outdoors?
Under the 2008 code, you must use UF cable anytime NM-style cable (even in conduit) exits the side of the house. That is, you are no longer allowed to put NM-B cable in watertight conduit outside of the house in wet locations.
Can nm-b wire be used in a garage?
Exposed NM, NMC and NMS cable are allowed to be run in “one- and two-family dwellings, their attached or detached garages, and their storage buildings” by the National Electrical Code (NEC 334.10 and 334.15).
What wire is suitable for outdoor use?
(Type UF cable is the most commonly used nonmetallic cable for residential outdoor wiring runs.) UF cable can be direct buried (without conduit) with a minimum of 24 inches of cover.
What is Type NM-b wire used for?
Type NM-B (Non-Metallic Sheathed Cable) is commonly used for residential wiring of luminaries, devices and appliances. Type NM-B ampacity limitation shall be in accordance with the 60ºC conductor temperature rating, as specified in the NEC.
Can you run Romex exposed outside?
No. Romex is not allowed to run exposed in any situation. In a dry, exposed area, you can use MC cable and metal boxes. In a damp area as your patio cover could be, you could use non-metallic seal-tite or the trade name is Carflex or EMT.
Can I run Romex in PVC outside?
7 Answers. Yes, NM cable can be in conduit. In fact. NEC calls for it to be in conduit, when protection from physical damage is required.
Can you run Romex outside of wall?
Romex is a brand name of non-metal sheathing wire. To give you an overview of what the National Electrical Code (NEC) regulations state, Romex wire shouldn’t be left exposed anywhere in the house, be it the basement, attic, or the home itself.
Can nm B be exposed?
NM cable, also known by the trade name Romex, is the most common form of electrical wire used in residential electrical work. The sheathing on both 14 and 12 AWG wire is 15 mils thick. Still, no matter how strong the NM sheathing, it is not meant for exposed applications.
Does outdoor electrical wire need to be in conduit?
Generally speaking, yes, outdoor wiring needs to be in conduit to protect it from physical damage. Type UF cable needs conduit when exposed, no need for conduit on the buried sections.
What does the B stand for in NM-B cable?
1. Indoor NMB cable or Romex® 12/2 cable. NMB stands for non-metallic because it has a PVC jacket instead of a metal-clad jacket. It is a basic indoor electrical wire used to deliver power from an electrical box to lights, outlets and appliances.
Why is Romex illegal?
Staffers there said house wiring known by the brand name Romex can be dangerous if the insulation is gnawed by rodents or punctured by nails. They said the flexible insulation on the cable lacks the protection of conduit, the rigid metal tubes that encase wires.
Where can I buy nm-b building wire?
Wire & Cable Your Way offers NM-B Building Wire products at great prices – available by the foot available for immediate delivery. Non-metallic sheathed NM-B cable is used in dry applications, as branch circuits for outlets, lighting and other residential loads.
Can type nm-b (14-3) Romex wire be used outdoors?
Can type nm-b (14-3) romex wire be used outdoors if placed in conduit to add additional receptacles to the back of a house/ Depends on your local ordinances. I personally wouldn’t. If using all conduit outside, pull THHN/THWN instead of Romex. No. Romex+outside in conduit= wet location.
What is nm-b cable used for?
Non-metallic sheathed NM-B cable is used in dry applications, as branch circuits for outlets, lighting and other residential loads. It may be fished through masonry or tile walls, where not exposed or subject to excessive moisture or dampness.
How many conductors are in a nm-b wire?
More Information Cable Type NM-B Wire Size 4 AWG # of Conductors 3 Conductors w/ Ground Conductor Material Bare Copper Ampacity 70