12/5/2023 0 Comments 4 awg splice connectorFortunately, a NEMA 1 pull box of that size (such as this) isn't too hard to get one's paws on - your local electrical supply house should definitely be able to get one in for you. Given that you are splicing in this box, and that a 4/3 W/G cable is equivalent to 4 4AWG THHNs (actually a bit less due to the ground being bare, but lets ignore that for now) or 212mm2 of fill, which barely fits down most types of 1" conduit, we wind up needing at least a 6" square box, and likely something more like an 8" square box. (trade size) raceway required for the number and size of When transposing cable size into raceway size inģ14.28(A)(1) and (A)(2), the minimum metric designator ![]() Same conductor shall not be less than six times the metricĭesignator (trade size) of the larger raceway. The distance between raceway entries enclosing the Of a box or conduit body opposite a removable cover theĭistance from that wall to the cover shall be permitted toĬomply with the distance required for one wire per terminal Shall be calculated individually, and the single row that provides the maximum distance shall be used.Įxception: Where a raceway or cable entry is in the wall This distance shall be increased for additional entriesīy the amount of the sum of the diameters of all other racewayĮntries in the same row on the same wall of the box. Times the metric designator (trade size) of the largest raceway Wall of the box or conduit body shall not be less than six Where splices or whereĪngle or U pulls are made, the distance between each raceway entry inside the box or conduit body and the opposite Or conduit body shall not be less than eight times the metricĭesignator (trade size) of the largest raceway. Shall be the metric designator (trade size) expressed in the ![]() Where an enclosure dimension is to be calculatedīased on the diameter of entering raceways, the diameter Raceway or cable run shall comply with (A)(1) through Of 4 AWG or larger that are required to be insulated, and forĬables containing conductors of 4 AWG or larger, the minimum dimensions of pull or junction boxes installed in a As to containing the splices, you will need something larger than a normal junction box - in fact, what you need is called a pull box, and needs to be sized according to NEC 314.28(A): Splicing wire this large is indeed done with insulated mechanical splice connectors like the one you linked - you will need one per wire, and a torque screwdriver or wrench, marked and calibrated in inch-pounds, to install them properly. You'll need a box, and a pretty chunky one at that
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