If the box was installed recently in accordance with National Electrical Code (NEC), the box should be labeled if it’s rated to support a ceiling fan. 314.27 Outlet Boxes.

Can a junction box hold a ceiling fan?

Quote from Youtube video: If you want to put a ceiling fan in between joists you can use a fan support box like this which has a maximum weight of 70 pounds. And that's all metal.

How much weight can a ceiling junction box hold?

Mounting screws go through box and into joist. Box will support up to 70 lbs. for fans and 90 lbs. for fixtures.

How much weight can a ceiling fan box support?

All ceiling boxes are required to support at least 50 pounds (NEC 314.27(A)), so you can assume the box will be able to support a simple light fixture. Boxes that are designed to support ceiling fans must be labeled as such, and must have a label listing the weight it can support if over 35 pounds (NEC 314.27(D)).

What is the minimum weight that a ceiling outlet box is required to support?

50 lb

(2) Ceiling Outlets

Boxes shall be required to support a luminaire weighing a minimum of 23 kg (50 lb).

Can a light box hold a ceiling fan?

Use an Electrical Box Rated for Ceiling Fans

If you’re replacing a light fixture with a ceiling fan, you should know that you can’t use the same electrical box to hold up a ceiling fan that you used to hold up the light fixture. Light fixture boxes aren’t strong enough to hold the weight of a ceiling fan.

How do you brace a ceiling fan?

Quote from the video:
Quote from Youtube video: Turn the shaft by hand to lock it between the joists slip the saddle over the brace feed the cable into the new. Box. Fasten the box to the saddle.

Can a ceiling fan be too heavy?

If you don’t see something like that, you’re going to need to take out some of the ceiling and replace to box with a fan box or run the risk of the fan being too heavy and falling down at the worst possible time.

How much weight can a metal junction box hold?

Conventional metal or plastic rough-in boxes aren’t supposed to hold any more than 50 pounds, and most fans exert more force than that.

What kind of box do I need for a ceiling fan?

Ceiling fan boxes must be UL-listed for ceiling fan mounting and marked “For Use With Ceiling Fans.” Do not use standard round or octagonal boxes for installing ceiling fans. Ceiling fan boxes require special fastening to withstand the dynamic loading of a rotating fan.

Can you put an outlet in a ceiling box?

Depending in the screw holes on your box, you may also be able to fit a standard duplex receptacle and fit a wall plate designed for that purpose. These act as a wall plate and mounting bracket/adapter for mounting a standard receptacle in the round box.

How much weight can an octagon box hold?

Standard octagon electrical boxes may be rated to support up to 35 pounds (depending on the installation method), while boxes with lightweight braces may be rated for only 10 or 15 pounds. Heavy-duty ceiling fan boxes may be rated for upwards of 50 pounds.

What shall not support luminaires weighing over 6 lb?

As long as the weight being supported does not exceed 6 pounds (3 kg), the wall-mounted luminaire can be supported by boxes (such as device boxes) not specifically designed to support luminaires. This exception does not specify whether the box must be mounted horizontally or vertically.

What type of box must be used to support ceiling fans greater than 35 pounds?

Support Requirements

The National Electric Code requires that all fans 35 pounds and over must be supported with an outlet box or outlet box system that is listed for ceiling fan support. The manufacturer must have marked the outlet box system to indicate that it is acceptable for ceiling fan installations.

How should a luminaire that weighs more than 50 lbs be supported?

Ceiling Outlets

A luminaire that weighs more than 23 kg (50 lb) shall be supported independently of the outlet box, unless the outlet box is listed and marked for the maximum weight to be supported.

Can framing members of dropped ceilings be used to support luminaires?

Framing members of suspended ceiling systems used to support luminaires shall be securely fastened to each other and shall be securely attached to the building structure at appropriate intervals. Luminaires shall be securely fastened to the ceiling framing member by mechanical means, such as bolts, screws, or rivets.

What does the NEC require for support means of luminaires?

Luminaires must be attached to the suspended-ceiling framing members with screws, bolts, rivets, or clips that are listed and identified for such use [Sec. 410.36 (B)] (Figure).

What is the maximum weight of a luminaire that can be supported by the screw shell of a lampholder?

6 lb

A luminaire that weighs more than 3 kg (6 lb) or exceeds 400 mm (16 in.) in any dimension shall not be supported by the screw shell of a lampholder.

What is the requirement supporting a lay in fixture in a suspended ceiling?

It just specifies that if the suspended ceiling is used for support, then the luminaires must be attached to the suspended ceiling framing with screws, bolts, rivets, or clips listed and identified for such use [410.16(C)].

How do you install a suspended ceiling?

Quote from the video:
Quote from Youtube video: Hold up the first runner and attach it to the hanging wires across the room until fully installed. Continue the installation of all the main runners.