The Arlington FBS420 is a 2 in deep steel octagon box for fans and fixtures that mounts under the joist in new construction. It gives 20.0 cu in for splices and ships with its NM connector, mud cover and screws in place. Arlington lists it at 70 lb fan and 200 lb fixture under UL; for Canadian work its CSA rating is 50 lb for a fan or fixture.
Why electricians pick it
- CSA rated 50 lb fan or fixture; UL rated 70 lb fan and 200 lb fixture.
- 2 in depth and 20.0 cu in hold more splices than a shallow pan box.
- Mounts under the joist; four installation screws are parked in place, ready for the installer.
- Includes NM cable connector, mud cover and two fan/fixture bracket screws.
- Combination hex/Phillips head screws for fast power-driver installs.
Specifications
| Spec |
Detail |
| Brand |
Arlington Industries |
| Model |
FBS420 |
| Type |
Steel octagonal fan/fixture joist box, under-joist mount |
| CSA rating (Canada) |
50 lb fan / 50 lb fixture |
| UL rating (US) |
70 lb fan / 200 lb fixture |
| Volume / depth |
20.0 cu in / 2 in |
| Max conductors (Arlington chart) |
10 x #14, 8 x #12, 8 x #10 |
| Construction |
New work only |
| Finish |
Plated steel |
| Arlington pack |
25 pcs |
Pro tip from the counter
With room for ten #14 conductors on Arlington's chart, this is a sensible box to use as a junction point at a fan location, such as bringing in the feed plus separate fan and light switch legs, where a 6 cu in pan box would be overfilled.
Best for: fan locations with multiple cables, new-construction ceiling boxes, steel box specs, fan and light combos on separate switches
Downloads: Spec sheet (PDF) · Arlington fan/fixture box ratings chart (PDF)
Shipped across Canada from Vaughan, ON. For contractor pricing ask for a quote or call (905) 553-7171.