DKS 1802 - Grounding

1802-065-D-10-14
14
The use of surge suppressors can significantly reduce the chance of component failure because of static charges or surges.
DoorKing recommends Installing a Phone Line surge suppressor (DoorKing P/N 1877-010 or equivalent) and a Low Voltage
surge suppressor (DoorKing P/N 1878-010 or equivalent) to help protect the entry system from power surges.
Proper grounding of this system is a requirement. To be effective, ground connections should be made with a minimum 12
AWG, 600 volt insulated wire to a ground point within 10 feet of the telephone entry system. The ground point must be at an
electrical panel, a metallic cold water pipe that runs in the earth, or a stainless steel grounding rod driven at least ten (10) feet
into the soil. A mounting post anchored to concrete does NOT make a good ground.
16.5 VAC Transformer
Surge suppressor within 3 ft of ground source.
POWER LINE
1878-010
Low voltage surge suppressor
within 10 ft of entry system.
Some Acceptable Ground Sources
Ground to a metallic cold water pipe.
Ground
Wire
Ground
Wire
Ground to an existing electrical system.
Electrical
Panel
Grounding rod 10 feet in soil.
IMPORTANT: Ground wire shown without
safety protection for clarity. Make sure
ground wire is protected from being
touched or electrical shock could occur!
Phone line surge suppressor
within 10 ft of entry system.
Surge suppressor within 3 ft of ground source.
Phone Company
PHONE LINE
1877-010
2.1.3 Grounding
2.1.4 Surge Suppression
2.1.5 Ferrite Filter
The Telephone Entry System comes with a Ferrite Filter. This will help prevent noise and hum pickup in the phone lines. Install
around the 16 VAC power wires on the main terminal #13 and #14.
To install the ferrite filter, release the clip on the side to open the
filter, place the wires in the circular core and snap the filter closed.
Power Wires
1
6A
C
14
13
12
11
10
9
8
1
6
AC
Main Terminal
N
O
NC
C
BAT
COM
Clip Release
Phone Line Surge Suppressor
Low Voltage Surge Suppressor
7
7
8
8
9
9
4
4
5
5
6
6
1
1
2
2
3
3
0
0
OPER
OPER
WXYZ
WXYZ
TUV
TUV
PQRS
PQRS
MNO
MNO
JKL
JKL
GHI
GHI
DEF
DEF
ABC
ABC
SP
SP
CALL
Z
A
7
7
8
8
9
9
4
4
5
5
6
6
1
1
2
2
3
3
0
0
OPER
OPER
WXYZ
WXYZ
TUV
TUV
PQRS
PQRS
MNO
MNO
JKL
JKL
GHI
GHI
DEF
DEF
ABC
ABC
SP
SP
CALL
Z
A