51
Fire Protection System Supervised Loops
NOTE: There must be adequate clearance above the hood to access components. Service
clearance of 18-inches is recommended.
The supervised loops are integral to proper operation and activation of the Fire Protection System. All
systems have two supervised loops; each loop consists of two conductors, one positive and one negative.
One loop is dedicated to all sensors, while the other is dedicated to all manual actuation devices (push/pull
stations). The supervised loop connections are located at the front edge of the hoods for accessibility.
Connections beyond the hood, like the connections at the manual actuation device, must be made with a
plenum-rated wire. It is recommended to use a two-conductor Belden 6320UL, 18 AWG, wire, or similar for
these connections. Refer to Figure 44 for supervised loop details.
• Connections to the firestat will use two terminal blocks. One for an incoming loop and one for an
outgoing loop.
• Flexible metallic conduit is used to route the wiring that connects the firestat to the remote loop
junction box. Secure conduit to hood hat channel when possible.
• The system contains two circuit ceramic terminal blocks for connecting from one hood to the next.
Figure 44 - Supervised Loop Connections
For connections on or above the hood, use Type MG or MGT wiring with High-Temperature Terminal
junction blocks. A Supervised Loop Connection kit is available to connect back to back or end to end
hoods. This kit will come with the necessary hardware and wire.
Table 18 - Supervised Loop Components
Connection Kit Part Number Length Location
SLPCON-03 3 Feet End to End Hoods
SLPCON-05 5 Feet End to End Hoods
SLPCON-10 10 Feet End to End and Back to Back Hoods
SLPCON-15 15 Feet End to End and Back to Back Hoods
SLPCON-20 20 Feet End to End and Back to Back Hoods
High Temperature Supervised Loop Component Part Number
Type MG Wire, White, 16 AWG 441601C6.FE9
Type MG Wire, Black, 16 AWG 441601C6.FE0
Two Conductor High Temp Terminal Block 20M4174
1. Firestat
2. Conduit
3. Junction Box
4. Ceramic Terminal Block
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