Grounding - DKS 1802 Installation & Owner's Manual

2.1.3 Grounding

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.
Ground to an existing electrical system.
2.1.4 Surge Suppression
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.
Phone Company
16.5 VAC Transformer
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.
l
i n a
e r m
C
1 6 A
i n T C
1 6 A
N O
M a
N C
C
B A T
M
C O
1 4
1 3
1 2
1 1
1 0
9
8
14
Some Acceptable Ground Sources
Ground
Wire
Ground to a metallic cold water pipe.
Phone Line Surge Suppressor
1877-010
Surge suppressor within 3 ft of ground source.
Low Voltage Surge Suppressor
1878-010
Surge suppressor within 3 ft of ground source.
C l i
p R
e l e
a s e
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
Phone line surge suppressor
within 10 ft of entry system.
PHONE LINE
Low voltage surge suppressor
within 10 ft of entry system.
POWER LINE
IMPORTANT: Ground wire shown without
safety protection for clarity. Make sure
ground wire is protected from being
touched or electrical shock could occur!
Ground
Wire
Grounding rod 10 feet in soil.
A
SP SP ABC ABC
1 1 2 2
GHI GHI JKL JKL
4 4 5 5
Z
PQRS PQRS TUV TUV
7 7 8 8
OPER OPER
0 0
CALL
A
SP SP ABC ABC
1 1 2 2
GHI GHI JKL JKL
4 4 5 5
Z
PQRS PQRS TUV TUV
7 7 8 8
OPER OPER
0 0
CALL
DEF DEF
3 3
MNO MNO
6 6
WXYZ WXYZ
9 9
DEF DEF
3 3
MNO MNO
6 6
WXYZ WXYZ
9 9
1802-065-D-10-14