IDEAL Industries 30-673 Wire-Nut® Wire Connector, Model 73B® Orange, Keg of 10,000

Yes. The Model 73B orange Wire-Nut is approved for bonding and grounding applications, so it can be used on your equipment grounding conductor splices in a box, not just line and neutral connections.

They are. The 73B orange Wire-Nut is rated for use in air handling spaces, which is what an inspector looks for when the junction boxes sit above a plenum ceiling or inside a return air chase. That rating is on the connector itself, so you still need the rest of the assembly (box, cable, fittings) to be plenum appropriate.

Yes, that is one of the things the 73B is built for. The description calls it excellent for fine stranded wire applications, and it uses a fixed square-wire spring rather than a round spring, which is what bites and holds a stranded bundle over time. Twist the strands up tight and keep them even before you thread the connector on.

The 30-673 is a keg of 10,000 Model 73B orange Wire-Nut connectors. It is a bulk pack meant for production wiring crews, fixture shops, and MRO stockrooms that go through connectors by the thousand rather than by the jar or bag.

Order IDEAL Industries 30-673. That catalog number is the Model 73B orange Wire-Nut supplied as a keg of 10,000. The color code matters when you are ordering blind: orange on an IDEAL Wire-Nut is the 73B, and the number 30-673 is what identifies the keg quantity as opposed to a smaller pack of the same connector.

The 73B is described as having a refined range to handle all common applications, which is why it tends to be the connector crews buy by the keg and use as their workhorse. That said, wire nuts are range rated by color across a manufacturer's line, so very small combinations and very large ones fall to other sizes. Pull the range printed on the 73B packaging and match it to the conductor counts you actually splice before standardizing a building on a single color.

No tool is required. The 73B has a positive grip shell made to be twisted on with your fingers, so an electrician can run a box of splices without picking up a nut driver. Crews doing high volume sometimes still use a driver socket for speed, but the connector does not depend on one.