Thomas & Betts IH4-1-LM Device Boxes, Covers & Accessories

The IH4-1-LM is a die cast aluminum Dry-tite style box that protects wiring devices, switches, electronic components and terminal blocks in dry, damp and wet locations. It is rain tight only when paired with the appropriate Red Dot cover, so the cover selection is what makes the installation weather resistant. The box itself is UL listed.

17 cubic inches in a single gang body. That volume is cast and marked right on the box along with the UL mark, which is what an inspector looks for when checking box fill. Work your conductor count against the 17 cubic inch figure before you decide whether you need a deeper body or a second box for splices.

Yes, it is a one gang device box, so a single switch, receptacle or similar device mounts in it. The mounting plates are fastened in place from the factory, which is what keeps the device from pulling loose and generating a call back. Covers come from the Red Dot line, and clean cast cover edges on the box give the cover gasket a proper seat.

No - the IH4-1-LM is a die cast aluminum device box that is rain tight when used with appropriate Red Dot covers and is UL listed for dry, damp and wet locations. For classified areas, the Appleton GRJ series explosionproof conduit outlet box in malleable iron (GRJL50) or the universal GRJS series explosionproof box are the boxes built for that duty.

The cast body runs 4-9/16 by 2-13/16 by 2 inches on the A, B and C dimensions, with 3-13/16, 3-1/2 and 3-1/4 inch figures on the E, F and G mounting references and 1-7/8 and 1-1/2 inches on H and J. Use the E/F/G numbers when you are laying out lug fastener locations on a wall or strut, since those are the spacing dimensions rather than the outside envelope.

It carries mounting lugs, which is what the LM in the model number refers to, so you can fasten it to masonry, wood, strut or a bracket without drilling through the wiring chamber. That keeps the interior sealed, which matters on the damp and wet location installs this box is used for.

Pick the cast aluminum IH4-1-LM where the enclosure takes mechanical abuse or needs to be rain tight with a gasketed cover, typically exposed exterior and industrial conduit work. For interior residential rough-in with multiple devices, a nonmetallic box such as the Cantex EZ Series PVC multi-gang residential outlet box is the usual choice. For a dedicated range or dryer outlet, the Pass & Seymour P242RRD thermoplastic range and dryer box is the purpose-built option.

The closest cross-brand equivalent we carry is the Mulberry Royal Mountie weatherproof outlet box, also die-cast aluminum and single gang. Both are cast metal single-device bodies for exposed work; confirm the hub arrangement matches your conduit runs before swapping one for the other.

The IH4-1-LM uses alloy A380 aluminum with certified zinc alloy and stainless steel springs for increased corrosion resistance, in a powder-coated silver finish, and is rain tight with appropriate Red Dot covers. The Appleton GRJ series boxes, including the GRJL50 and the universal GRJS, are malleable iron instead - a different material route to the same outdoor duty, and the one to specify if your drawing calls for iron conduit bodies.

The Cantex EZ Box series is a PVC multi-gang residential outlet box, which suits interior stud rough-in where more than one device sits in the opening. The IH4-1-LM is a single-gang box - 17 cubic inches, die cast aluminum, powder-coated - intended for device protection in dry, damp and wet locations with the matching covers.

That is one of its intended uses. The wiring chamber is accessible for pulling conductors, making splices and later system changes, and it serves as a junction box for branch conduits. Interior surfaces are precision cast and machined so conductor insulation is not shaved during a pull.

It is sold each, one box per inner package, with 50 to a full outer carton. Each box weighs 0.57 lbs, so a 50-count carton is light enough to handle without a lift if you are standardizing a facility on one box.

Yes, the IH4-1-LM is RoHS compliant, which is often required on government, healthcare and education specifications. It is also UL listed, with the UL mark cast into the box.