Steel City 664 S 2-Gang Recessed Floor Box, 70 Cu In, Iron

The 664 S is a 2-gang recessed service floor box with 70 cubic inches of volume, which is what governs your conductor fill count under box-fill rules. For comparison within floor boxes we carry, the Wiremold 880W1 single-gang steel box is 53 cubic inches, so the 664 S gives noticeably more room and two gangs of device space.

It is stamped steel (iron body), not PVC. A steel box takes the abuse of a concrete pour and lets you bond the box itself as part of the grounding path. If you want a nonmetallic box for a slab instead, the Pass & Seymour TM1542 Series floor box is PVC.

Go two-gang when the location needs both power and low voltage, or two receptacles, in one penetration. The 664 S is a recessed service box with 70 cubic inches for that. If you are working in a thin slab or over a wood floor with limited depth, a shallow single-service box such as the Wiremold 885B or the 880M1 OmniBox shallow steel box is the better fit, since depth is usually what rules out the larger box.

The Steel City 664 S is a 2-gang recessed service floor box with 70 cubic inches of volume, so it is sized for two devices. For a single-device opening, the Wiremold 880W1 is a 1-gang steel floor box at 53 cubic inches, and the Wiremold 880M1 OmniBox is a single-gang shallow steel floor box. Both are steel like the 664 S but carry one device instead of two, which also reduces the conduit entries you need to feed.

Six knockouts, at 3/4 inch, so you can bring conduit in and out of the box from multiple directions without adding a condulet. One is a blank knockout per the model designation. That count matters when you are feeding through a box in a run of floor outlets rather than terminating at it.

The 664 S is the box body only, sold each. Service cover plate, carpet flange, and the devices are separate items, so order the cover assembly that matches the service you are putting in the opening.

Yes. The Steel City 664 S has a stamped steel body, while the Pass & Seymour TM1542 Series floor box is PVC. A non-metallic body is the usual choice where the box is set directly in concrete and corrosion is a concern, and it changes how bonding is handled since a steel box is part of the metallic raceway path. Confirm the device capacity and conduit entries of the TM1542 match what the 664 S two-gang, six-knockout configuration was feeding.

Treat them as different boxes rather than interchangeable ones. The Steel City 664 S is a 2-gang recessed service box at 70 cubic inches, while the Wiremold 885B is a shallow single service box and the 880W1 is a 1-gang box at 53 cubic inches. Gang count, volume and cover prep all differ, so a 664 S replacement in an existing floor generally calls for another 2-gang body unless the devices are being reduced to one service as well.

Country of origin is the United States. That answers the Buy American / domestic-preference question that comes up on government, school, and federally funded work.