
FORM 9761 REV. A ECO 1-7899 2/20238 OF 14
Supply Wire Size Recommendations
The table at the right is provided to assist the
licensed electrician in sizing the electric supply
wires required to deliver power to each individual
heater. All branch circuit supply wiring must be
copper, rated 90oC minimum and comply with all
local codes and the NEC.
All recommended wire sizes assume a 50ft.
maximum wire length.
REQUIRED CLEARANCES
DO NOT install heaters closer than 36 inches to a
vertical surface or 24 inches to a ceiling. Heaters
MUST BE SEPARATED by more than 36 inches and
87 inches from any combustible surface in direct
radiation path.
HEATER HANGING ALTERNATIVES
One method of hanging the heaters (shown below)
is with hardware chain and “S” hooks. The chain and “S”
hooks must be either 14 or 16 gauge for all models. The
heaters also can be mounted “xed” with angle iron,
metal rods or metal straps OR threaded rod.. Whatever
means is used to mount the heaters, the terminal box
must be EVEN WITH or LOWER THAN the horizontal
plane of the heater housing.
FIRE HAZARD
BURN HAZARD
• Install heaters to comply with
REQUIRED CLEARANCES
listed above at right.
• Do not mount heaters
vertically.
INSTALLATION - HANGING HEATERS
INSTALLATION PLANNING (CON’T.)
Heater Model kW Volts Amps Recommended
AWG Wire Size
3ph 1ph 3ph 1ph
FSA-1412-1 1.45 120 N/A 12.08 N/A 12
FSA-1420-1 1.45 208 N/A 6.97 N/A 12
FSA-1424-1 1.45 240 N/A 6.04 N/A 12
FSA-1427-1 1.45 277 N/A 5.23 N/A 12
FSA-1448-1 1.45 480 N/A 3.02 N/A 12
FSA-1457-1 1.45 600 N/A 2.52 N/A 12
FSA-3120-1 3.15 208 N/A 15.14 N/A 12
FSA-3124-1 3.15 240 N/A 13.13 N/A 12
FSA-3127-1 3.15 277 N/A 11.37 N/A 12
FSA-3148-1 3.15 480 N/A 6.56 N/A 12
FSA-3157-1 3.15 600 N/A 5.48 N/A 12
FSA-4320-3 4.3 208 11.9 20.67 12 10
FSA-4324-3 4.3 240 10.4 17.9 12 10
FSA-4327-1 4.3 277 N/A 15.5 12 12
FSA-4348-3 4.3 480 5.2 9.0 12 12
FSA-4357-3 4.3 600 4.3 7.5 12 12
FSA-6520-3 6.5 208 18.1 31.3 12 8
FSA-6524-3 6.5 240 15.7 27.1 12 8
FSA-6527-1 6.5 277 N/A 23.5 N/A 10
FSA-6548-3 6.5 480 7.8 13.5 12 12
FSA-6557-3 6.5 600 6.5 11.3 12 12
FSA-9520-3 9.5 208 26.4 45.7 8 8
FSA-9524-3 9.5 240 22.9 39.6 10 8
FSA-9527-1 9.5 277 N/A 34.3 12 8
FSA-9548-3 9.5 480 11.4 19.8 12 10
FSA-9557-3 9.5 600 9.5 16.5 12 10