![]() It's likely to be permitted and safe to install a larger sized junction box than you need for an outlet or switch or wire splice, but you may need to purchase a special adapter-cover for the box in order to properly secure an electrical outlet therein. The box is carrying six wires in total: two "hot", two neutral, and two grounds.Īt above right in addition to aluminum wiring hazards the box is overcrowded. Typical electrical junction boxes used for receptacle installation to accommodates a single receptacle are 2" x 4" metal or plastic boxes of varying depth.Ĭhoose a deeper box if you have more than the minimum number of wires entering & leaving the box or it will be over-crowded and may violate building electrical codes.īelow are an older style steel electrical boxes nailed to wood framing in a building. Typical Electrical Boxes for Single Receptacles, Switches, or Splices This is an excerpt pertinent to wiring electrical receptacles and switches other wire sized and applications are given in the source NEC. NEC 314.16(B) Electrical Box Volume Required Per Conductor (wire)įree space within the box for each conductor ![]() Table of Electrical Box Sizes vs Number of Wires Allowed
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