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Electrical
Boxes
What is the function of
Electrical Boxes
 is to house electrical
connections. These connections
might be to a switch, a
receptacle, the leads of a light
fixture, or other sets of wire.
Types of
Electrical Box
1. Wall boxes
 They are used for housing
switches and receptacles.
They are made of metal or
plastic and have the capability
to be mounted to a wall or stud.
The holes in the side of the box where
the conduit enters the box are called
knockouts. In metal boxes, the conduit
can also be secured to the holes.
One type is a four-inch square box that
is only 1 ½” or 2” deep used in places
that are too shallow to mount a standard
box.
Types of Wall
Boxes
a. Handy boxes are
surface
mounted with
rounded corners
for safety.
b. Drywall boxes
have expandable
arms and can be
mounted on a
drywall.
c. Plastic boxes
are best for new
installation and often
have a nail built-in for
quick attachment to
the stud.
d. Gem boxes
are commonly made
boxes, usually in 2”
wide, 3” high and 2
1/2” deep and made of
metal. Deeper boxes
are also available.
2. Ceiling Boxes
 They are also known as junction boxes
or splice boxes.
They are used to anchor ceiling fixtures
and serve as a junction box where wires
can meet and run to other areas of the
room.
They are either 4” octagonal or round
shaped, and either 1-1/2” or 2-1/8”
deep.
 They may also include
adjustable mounting hangers
that attach to rafters in the
ceiling and allow the box to be
placed anywhere in between.
 Hangers also provide the
short nipple or threaded rod
that secures lighting fixtures.
3. Weather-proof
Boxes
 They are also known as
an outdoor box.
They are used for
exterior switches or
receptacles.
They are thicker than
interior boxes and has a
rubber gasket between
the cover and the box
to keep out water.
Their covers are either
screw-on or Snap-On.
4. Wall Plates
They are known
as faceplates or
covers.
They are flat metal, plastic or
wooden piece that covers the
openings in the wall made by
receptacles and switches.
Their openings in the cover match
the type and number, or
receptacles or switches being
covered. Blank covers are also
available.
1234567891011121314Electrical-Boxes.pptx

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1234567891011121314Electrical-Boxes.pptx

  • 2. What is the function of Electrical Boxes  is to house electrical connections. These connections might be to a switch, a receptacle, the leads of a light fixture, or other sets of wire.
  • 4. 1. Wall boxes  They are used for housing switches and receptacles. They are made of metal or plastic and have the capability to be mounted to a wall or stud.
  • 5. The holes in the side of the box where the conduit enters the box are called knockouts. In metal boxes, the conduit can also be secured to the holes. One type is a four-inch square box that is only 1 ½” or 2” deep used in places that are too shallow to mount a standard box.
  • 7. a. Handy boxes are surface mounted with rounded corners for safety.
  • 8.
  • 9. b. Drywall boxes have expandable arms and can be mounted on a drywall.
  • 10.
  • 11. c. Plastic boxes are best for new installation and often have a nail built-in for quick attachment to the stud.
  • 12.
  • 13. d. Gem boxes are commonly made boxes, usually in 2” wide, 3” high and 2 1/2” deep and made of metal. Deeper boxes are also available.
  • 14.
  • 15. 2. Ceiling Boxes  They are also known as junction boxes or splice boxes. They are used to anchor ceiling fixtures and serve as a junction box where wires can meet and run to other areas of the room. They are either 4” octagonal or round shaped, and either 1-1/2” or 2-1/8” deep.
  • 16.  They may also include adjustable mounting hangers that attach to rafters in the ceiling and allow the box to be placed anywhere in between.  Hangers also provide the short nipple or threaded rod that secures lighting fixtures.
  • 17.
  • 18. 3. Weather-proof Boxes  They are also known as an outdoor box. They are used for exterior switches or receptacles.
  • 19. They are thicker than interior boxes and has a rubber gasket between the cover and the box to keep out water. Their covers are either screw-on or Snap-On.
  • 20.
  • 21. 4. Wall Plates They are known as faceplates or covers.
  • 22. They are flat metal, plastic or wooden piece that covers the openings in the wall made by receptacles and switches. Their openings in the cover match the type and number, or receptacles or switches being covered. Blank covers are also available.