The 5 Best Extension 4 Inch Electrical Boxes (2022 reviews)

The look and feel of these boxes are consistent with the high quality we're used to from the rest of Imbaprice's lineup. The Imbaprice Extension 4 Inch Electrical Box is large and it allows for extra room. Make sure this fits by entering your model number. This trimmable box extender is capable of accommodating shallow boxes and avoids obstructions.

The box is perfect for white color, is made for the price point and it is very nice. Further, this allows for easy installation, is made for easy install and it worked perfectly. Above all, the imbaprice extension 4 inch electrical box can be used on a 3-1/2 inch and 4 inch round and octagonal set back ceiling box.

Most customers quickly discovered that the boxes are plenty long enough though. In addition, a few also found that the box is great for extending existing ceiling boxes.

Customers say that getting a extension 4 inch electrical box, along with box is useful.

Top Customer Quotes:

This is the only one that included the long screws.
This works as described, comes with the correct size and it works well.
It is white and it can be bought for good value.
Plastic material; 1-1/2 inch; octagon shape; 4.35 inch diameter; height 4.85 inch.

Best For Ceiling Fan: Bell Extension 4 Inch Electrical Box

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Best part: Bell Extension 4 Inch Electrical Box costs comparatively little and it is available to ship in 24 hours. The bell extension 4inch electrical box includes installation hardware, closure plugs, gasket, and multi-lingual instructions. Make sure this fits by entering your model number. Also, this is ideal for electrical boxes and it is used for security cameras.

The box makes for plenty of room, is great for box type and it has mounting screws. Above all, the bell extension 4 inchelectrical box works great and it is great for good quality.

Almost all customers quickly discovered that the box was perfect for 2.75 mud rings and 3.5" boxes. And, they also found that the box includes everything you need. Also, they say that the included gasket seals between the wall and box extension, then the motion sensors and security lights are screwed to the extension ring with their own gasket. To sum up, for almost all customers, Bell product was the most suitable.

Customers discovered that getting a weatherproof electrical gasket, along with box is useful.

Top Customer Quotes:

This is easy to use and it allows for extra room.
This is perfect and bolted up with no issues.
This is an extension box (1) and is open at the back.
It is about 1-1/4 inches deep.

Best For Light: Thomas & Betts Square Box

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The Thomas & Betts square box is capable of outshining several other boxes featured in this list in overall features in its price range. The Thomas & Betts square box is the industries leading product line of metallic switch and outlet boxes used in electrical construction. The extension is used when you need to add wire capacity and mounts directly on top of the square box so additional circuits can be ran. In addition, it is built with the finest quality, it works as advertised and has great design. Finally, the Thomas & Betts square box is PVC, It is great for good quality and has a good design.

Most buyers opine that the box is well made, but not of gold. In addition, a few strongly agree that the box will not accept a light fixture hanger without the use of a round "mud-ring. To sum up, buyers found this to be one of the best boxes for daily purposes.

Why We Like This:

Used when you need to add extra wire capacity.
Good investment for the long term.

Best For Dry Locations: Sigma Electric Extension 4 Inch Electrical Box

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The Sigma Electric Extension 4 Inch Electrical Box should be able to handle its purpose and duties with ease. The sigma electric extension4 inch electricalbox is used to extend the depth of a 4-in round weatherproof box. Sigma's weatherproof extension ring increases the capacity of a weatherproof box. And, this is ul and csa listed, suitable for wet locations and nema 3r rated.

Lastly, the sigma electric extension 4inch electricalbox works like a charm and it is for dry locations.

In short, at the price, they believe that they got a steal of a deal with it.

Customers discovered that getting a weatherproof electrical gasket, with this box made their life much easier.

Why We Like This:

Die-cast metal construction and powder coat for corrosion resistance.
This includes closure plugs, hardware and gasket.
Features four 1/2-in knockouts and a 16.5 cu. In. capacity.
This is perfect for high quality and it has four 1/2-in knockouts.

Best For Semi Exposed Areas: Thomas & Betts Extension 4 Inch Electrical Box

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The Thomas & betts extension4 inchelectrical box is satisfactory and appropriate and fits well with your daily purpose. Make sure this fits by entering your model number. And, the box is made with steel material and it is perfect for home improvement. To sum up, with a 4.5 rating and more than 232 buyers, the Thomas & betts extension 4 inch electrical box stands as the best choice.

Most customers opine that the box is great for semi exposed areas. In short, the tone of buyers is very positive and we believe that the box suits the purpose.

Few customers bought menards electrical box, along with the box.

Why We Like This:

(3) 1/2 inch each side, (1) 1/2 inch each end knockouts.
One of the newcomers and featured product.

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