N93-586-84 Issue 04 AB Page 16 of 32 © Protec Fire Detection plc 2015
5.13 Connecting the Mains Cabling
Isolate the incoming mains supply by ensuring the fused double pole isolator is in the
‘OFF’ position.
Pay particular attention that the incoming mains cable is segregated from all other
cables within the 3500 enclosure.
Ensure the incoming earth cable is firmly connected to the Main PCB (see figure
5.9) and the earth cable from the Main PCB is securely connected to the brass earth terminals
within the back-box.
The mains wiring must now be restrained using the clamp provided to secure the mains
cables to the control PCB housing (see figure 5.10). The restraining clamp must be supported
at the rear when the two screws are being tightened.
Figure 5.9 Power Supply Terminal Details
Figure 5.10 Mains wiring connections
Mains wiring
clamp
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