![]() ![]() Modern wiring systems with NM-B cable usually include a ground wire inside the cable, so the box is not part of the grounding system (however, metal boxes must be connected to the system ground, usually with a short length of wire called a pigtail). If you are using a non-metallic cable, such as Type NM-B (non-metallic sheathed cable), then you can use either plastic boxes or metal boxes, as long as the cable is secured to the box with an appropriate cable clamp. Plastic boxes are typically cheaper in price and include built-in clamps for wires. Underground Pull Boxes can be used as an equipment enclosure, splice box, or pull box.These boxes are used to store electrical wiring, fiber optic cable, phone lines, water lines and other wires or cables that are buried underground. Polymer enclosures provide medium to heavy duty solutions for vaults, splice boxes and meter boxes municipal water, telecommunications, and other commercial and industrial applications. ![]() Metal boxes are more durable, fireproof, and secure. Hubbell Power Systems manufactures a variety of enclosures for the electric utility, communications, C&I and water markets to provide safe, durable and cost effective housing for utility systems equipment. Oldcastle Polymer enclosures deliver strength and durability like traditional concrete, but at a fraction of the weight. Available in a large variety of sizes and styles with either standard, heavy duty or optional overlapping covers. electrical, telephone, fiber optics, CATV, water, gas, etc.). If you are using metal conduit to run wiring to the electrical box, then a metal box is required-both to anchor the conduit and because the conduit and metal box itself may be used to ground the system. For use as splice boxes, pull boxes or equipment enclosures for any application requiring easy access to an underground service (i.e. Weatherproof metal boxes for outdoor use are generally made of aluminum. Recommended for all grades and types of Carlon PVC conduit, duct, wire way and fittings, except Flex-Plus Blue ENT (electrical non-metallic tubing). ![]() Most electrical boxes are either metal or plastic: Metal boxes are generally made of steel, while plastic boxes are either PVC or fiberglass.
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