Wire Conduit Through Roof Plastic Or Metal

Other types of wire have a sticky rubber sheathing that makes them almost impossible to pull.

Wire conduit through roof plastic or metal.

Imc conduit is a thicker conduit that is galvanized making it a great choice for outdoor installations. Stranded thhn is used on most commercial jobs it s more flexible than solid wire which makes it easier to pull and it doesn t spring back when. Electrical conduit is metal or plastic pipe through which electrical wires are run. When running wire short distances with few bends such as between boxes 2 and 3 and 3 and 4 you can simply tape the two wire ends together and push them through the conduit photo 13.

For longer distances or runs that have two or more bends run a fish tape through the conduit and tape the wires to it photo 14 and detail photo. Running wires inside rigid metal conduit rmc is a little more expensive than burying underground feeder cable uf but it saves labor. Connect the ground wire in the plastic box to the metal box extension by screwing a no. Readily penetrate metal lic conduit embedded within or directly underneath roof assemblies.

Self cutting or self drilling roof fasten ers can readily penetrate metals of these thicknesses. By way of comparison the wall thick ness of 1 2 inch thick metallic conduit is comparable to the metal thickness of a 20 gauge steel roof deck. Old wiring can present a fire hazard but is extremely expensive and complicated to replace. It is also used in unfinished areas like basements crawlspaces and attics and for surface mounted installations outdoors.

Rather than tear out walls or spend weeks fishing. Rigid conduit offers solid protection while flexible metal conduit allows for bends and twists without the use of extra hardware. Using metal conduit means less digging. Thhn thermoplastic high heat resistant nylon coated is the best wire for pulling through pvc conduit.

Then connect the grounding pigtail to the ground wire or wires in the plastic box with a wire connector. Rigid metallic conduit is most often used in commercial applications but can be a smart choice for straight runs of wire or cable through an attic garage basement or crawlspace. This is also a good choice for exposed walls in basements garages outbuildings and areas the conduit can be hit or damaged. Rigid metal conduit is the thickest and heaviest of all.

10 32 grounding screw into the threaded hole in the metal box extension and connecting a short length of copper wire grounding pigtail to the screw. Rewiring a house from the outside using conduit.