2-4
MEGA3 NFPA Medical Gas Notification System
4107 9016 59.03
Refer to
NFPA Master/Combination Wiring
Diagram (Section 3.1/3.3)
for B1X, B50, B65
signal boards.
• Relay outputs
Two conductors are required for each signal
between relay output terminals and remote
device (such as a building automation sys-
tem). Refer to the wiring requirements of the
connecting device when selecting the ap-
propriate type of conductors to use (i.e.. wire
gauge, twisted or not, shielded or not.)
Refer to
NFPA Master/Combination Wiring
Diagram (Section 3.1/3.3)
for B4X, B50, B65
signal boards.
2.3.4 Power Supply
A power supply assembly is provided with
the alarm panel. The installer must use
18AWG copper supply wiring minimum
with an insulation of not less than 1/32 inch
(0.8mm) thick. Power supply shall be con-
nected to a building installed circuit breaker.
Circuit breaker shall be a maximum of 15
amps and marked as disconnecting means for
the alarm panel. It is recommended that the
circuit breaker be in close proximity to the
alarm panel and properly selected according
to local and national regulations.
Holes are provided in the top and bottom of
the rough-in box for main power (Figure 20).
If power is entering from the top, it must be
routed under the cable raceway.
NO OTHER HOLES SHOULD BE PUNCHED
OR USED.
Several additional holes or knockouts are pro-
vided on the top panel and bottom for en-
trance of low voltage field wiring (Figure 20).
Alarm panels require 100 to 250 VAC
0/60 Hz 250mA power.
NFPA Area Wiring
Diagram (Section 3.2)
.
CAUTION
:
Do not connect MEGA3 master/combina-
tion alarm to switch/relay contacts connect-
ed to any alarm panels other than those
listed below:
• TotalAlert Infinity
™
• TotalAlert 2
• MEGA3
• MEGA2
• MEGA
NOTE
:
All wiring shall be protected from physical damage
by raceways or conduit in accordance with NFPA 70,
National Electric Code.
Cable Raceway
Power Supply
Wire Entrance
for power cable
(alternate)
Contractor to install
UL rated strain relief or
conduit connector
Figure 20: Wire Routing
