Use your house wiring with a generator when the electric utility power fails

National Electrical Code requires a system in place that prevents an emergency generator from feeding back into the utility line.

A generator interlock will:

• only allow the the generator breaker to be switched on if the main breaker is off
• not allow the main breaker to be turned on unless the generator breaker is off

B-2

Bryant Main Breaker

2 handle Bryant main breaker with the generator breaker vertically adjacent below or above the main breaker

CH-1

Cutler Hammer

1 handle horizontal throw right to left main breaker offset to the left over 2 breaker columns with a 1 1/4" space between main breaker and column breakers

CH-3

Cutler Hammer

1 handle horizontal throw right to left main breaker offset to the right over 2 breaker columns with a 1 1/2" space between main breaker and column breakers

CH-5

Cutler Hammer

1 handle vertical throw main breaker centered over 2 breaker columns with a 2 1/4" space between main breaker and breaker column

CH-6

Cutler Hammer

1 handle vertical throw main breaker centered over 2 breaker columns with a 4 1/4" space between main breaker and breaker column

CH-7

Cutler Hammer

meter / main combination with 1 handle horizontal throw main breaker centered over 2 breaker columns with a 1 1/4" space between main breaker and breaker columns

CH-8

Cutler Hammer

meter / main combination with 1 handle horizontal throw main breaker, offset left, 4 1/4" over 1 breaker column

CR-1

Challenger/Westinghouse/Thomas & Betts

meter / main with 2 handle vertical throw main breaker with a 4 1/2" space between main breaker and a single breaker column

CR-2

Challenger/Westinghouse

200A two handle horizontal throw main breaker offset 1 1/4" left of center and 1 1/4" above two breaker columns

CR-3

Challenger/Westinghouse

2 handle vertical throw main breaker centered 3 1/2" above two breaker columns

CRO-1

Crouse Hinds

2 handle horizontal throw main breaker offset 1/4" right of center and 1/2" above two breaker columns

CRO-2

Crouse Hinds

1 handle hump main breaker (on to the left) 1 7/8" above right breaker column

CRO-3

Crouse Hinds

1 handle hump main breaker, on to the left, at the top of a single breaker column

GE-1

General Electric

4 handle horizontal throw main breaker - offset right of center 5/8"- over 2 breaker columns with a 1 1/4" to 1 5/8" space between main breaker and column breakers

GE-2

General Electric

4 handle horizontal throw main breaker positioned in the middle of the breaker column

GE-3

General Electric

1 handle vertical throw main breaker centered 2 1/2" above 2 breaker columns

GE-4

General Electric

4 handle vertical throw main breaker centered over 2 columns with a 2 1/4" space between main breaker and column breakers

GE-6

General Electric

2 handle horizontal throw main breaker at the top of the right column with an 11/16" space between breaker columns

GE-7

General Electric

2 handle horizontal throw main breaker - offset right of center 5/8"- over 2 breaker columns with a 1 1/4" to 1 5/8" space between main breaker and column breakers

GE-8

General Electric

meter / main combination with two handle main breaker at the top of 1 column of breakers

GE-13

General Electric

4 handle vertical throw main breaker centered beneath 2 breaker columns with a 2 1/4" space between main breaker and column breakers

GEN-1

Murray, Siemens, GE, etc.

most any 2 handle horizontal throw main breaker opposite a 2 handle generator breaker with a 1 1/2" to 1 3/4" space between toggles when one is off and the other is on

GEN-2

Murray, Siemens, GE, etc.

most any 2 handle horizontal throw main breaker adjacent above or below a 2 handle generator breaker

GS-1

General Switch

100 amp 2 handle horizontal throw main breaker at the top of the left breaker column

ITE-1

ITE - Murray

2 handle vertical throw main breaker centered 1 1/4" above two breaker columns

M-1

Murray - ITE - Siemens

4 handle vertical throw main breaker centered over 2 breaker columns

M-2

Murray - Crouse Hinds

hump main breaker with horizontal throw on top of the right side breaker column

M-3

Murray - Crouse Hinds

hump main breaker with horizontal throw on top of the left side breaker column

M-4

Murray - Siemens

100 amp 2 handle horizontal throw main breaker at the top of the right column

M-6

Murray

200 amp 1 handle horizontal throw main breaker positioned 7/8" left of center and 1 1/4" above 2 columns of breakers

M-7

Murray

200 amp 1 handle horizontal throw main breaker positioned at the top of the right column of breakers

M-8

Arrow Hart Murray

100 amp vertical throw main breaker centered 1/2" over two breaker columns - main is on in the down position

M-9

Murray

100 amp 2 handle horizontal throw main breaker centered 1 1/4" over two breaker columns

M-11

Murray

1 handle hump main breaker, with toggle on to the left, on top of the left breaker column

M-13

Murray

200 amp 1 handle horizontal throw hump main breaker, with toggle on to the left, on top of a phantom left breaker column

M-15

Murray

1 handle hump main breaker, toggle offset to the top and on to the right, on top of the right breaker column

SD-1

Square D

4 handle horizontal throw main breaker centered over 2 breaker columns with a 2 11/16" space between main breaker and column breakers

SD-2

Square D

1 handle horizontal throw left to right main breaker centered over 2 breaker columns with a 1 1/4" space between main breaker and column breakers

SD-3

Square D

1 handle horizontal throw left to right main breaker centered over 2 breaker columns with a 1" space between main breaker and column breakers

SD-4

Square D

1 handle vertical throw main breaker centered over 2 breaker columns with a 3 to 3 1/2 inch space between main breaker and column breakers

SD-5

Square D

100 amp 2 handle horizontal throw main breaker at the top of the right column

SI-1

Siemens

meter / main combination with a 4 handle vertical throw main breaker centered over 2 breaker columns with a 2 5/8" space between main breaker and 4 column breakers

SI-2

Siemens

1 handle horizontal throw main breaker offset left over 1 breaker column

TB-1

Thomas & Betts

2 handle horizontal throw main breaker offset 1 1/4" left of center and 1 3/4" above two breaker columns