Installation Manual

APPENDIX J:

SNOW MELT DIAGRAM 277V - TYPICAL LINE DIAGRAM (FOR 12 CIRCUITS/CABLES) WITH ECONOMY CONTROL

277V CIRCUITS

SLAB-SS

LOW VOLTAGE (24V)

120V

SWITCHED

POWER

Heater cable 50ft cold leads to be taken through

3/4” (19mm) rigid metal conduit back to J-boxes.

Slab mounted snow sensor, located

between two passes of Heating Cable.

Installer may use more J-boxes

outside or inside building.

277V CIRCUITS

J-BOX

HEATER CABLE / MAT #1

HEATER CABLE / MAT #2

HEATER CABLE / MAT #3

HEATER CABLE / MAT #4

HEATER CABLE / MAT #5

HEATER CABLE / MAT #6

SCE-120

CONTROLLER

277 VAC

BREAKER PANEL

RLY-12PL

RELAY PANEL

OutsideInside

120 VAC

BREAKER PANEL

J-BOX

HEATER CABLE / MAT #7

HEATER CABLE / MAT #8

HEATER CABLE / MAT #9

HEATER CABLE / MAT #10

HEATER CABLE / MAT #11

HEATER CABLE / MAT #12

120V

CONTROL

POWER

(conduit size as per installer / local code requirements)