INSTALLATION
2
WIRING REFERENCE TABLE
AWG/COLOR
Emergency Power In
12/Black
Emergency Neutral
18/Gray
Emergency Power Out
12/Red
Normal Power Sense
18/Black
Normal Neutral
18/White
Normal Switch Sense
18/Red
WARNING: TURN POWER OFF AT CIRCUIT BREAKER BEFORE INSTALLING. ONLY QUALIFIED
ELECTRICIANS SHOULD INSTALL THE BLCD-20B.
• BLCD-20B units shall be installed in accordance with state, local and national electrical codes and
requirements.
• BLCD-20B units are designed to attach to a junction box or electrical enclosures that are fitted with a
7/8” diameter opening (standard 1/2”knockout).
• BLCD-20B units operate with power provided by two sources. Place a warning label on each enclosure
that contains a BLCD-20B unit.
WIRING DIAGRAMS
NORMAL HOT
If required and available,
cut Blue Jumper
Loop to use with
NORMALLY CLOSED:
1) Test switch
2) Fire alarm panel
3) Security panel
4) Other
LOCAL
SWITCHING MEANS
NORMAL/EMERGENCY
LIGHTING
LOAD
BLCD-20B
NORMAL
NEUTRAL
EMERGENCY
NEUTRAL
RED #18
BLACK #12
WHITE #18
RED #12
GRAY #18
EMERGENCY HOT
NORMAL
LIGHTING
LOAD
BLACK #18
G
N
NORMAL
POWER
GENERATOR
EMERGENCY
PANEL
NEUTRAL BUS
FOR EMERGENCY PANEL
NEUTRAL BUS
FOR NORMAL PANEL
NORMAL
PANEL
TRANSFER
SWITCH
LOAD CONTROL RELAY
NORMAL HOT
If required and available,
cut Blue Jumper
Loop to use with
NORMALLY CLOSED:
1) Test switch
2) Fire alarm panel
3) Security panel
4) Other
LOCAL
SWITCHING MEANS
NORMAL/EMERGENCY
LIGHTING
LOAD
BLCD-20B
NORMAL
NEUTRAL
EMERGENCY
NEUTRAL
RED #18
BLACK #12
WHITE #18
RED #12
GRAY #18
EMERGENCY HOT
NORMAL
LIGHTING
LOAD
BLACK #18
G
N
NORMAL
POWER
GENERATOR
EMERGENCY
PANEL
NEUTRAL BUS
FOR EMERGENCY PANEL
NEUTRAL BUS
FOR NORMAL PANEL
NORMAL
PANEL
TRANSFER
SWITCH
EMERGENCY
SWITCH
SWITCH BYPASS
