Product Manual
ISSUE DATE 7/2015 REV. DATE- REV. LEVEL: - ECO 1-7092 OIPM P/N 8420 PG 6 OF 11
Preparations for Wiring Heaters
• The maximum ampacity rating for an
infrared heating circuit is 48.
• The opening in the terminal
box for
branch circuit supply wiring on FSP-14
and FSP-31 models is sized for 1/2-inch
trade size cable connectors.
Openings
in terminal boxes for supply wiring on
FSP- 43 and FSP-95 models are sized
for 3/4-inch trade size cable connectors.
• Cable connectors and cables are not
provided with these heaters.
(See
Specications on page 7 for
exceptions.)
The following tables are provided to assist the licensed electrician in sizing the electric cables and/or
plugs needed for each FSP heater model. Since only model FSP-1412-1C is equipped with cables and
plugs, these items for all other models will have to be obtained through a local supplier or purchased
separately from Fostoria. (See Table B.)
All supply cables must be copper, rated 90°C and comply with all local codes and the National Electric
Code (NEC).
All recommended wire sizes assume a 50ft. maximum wire length.
INSTALLATION PLANNING (con’t.)
FIRE HAZARD
• Serious injury or death may
occur.
• Heater circuit load calculations
and circuit design must be
done by a licensed electrician
or engineer.
MODEL VOLTS WATTS
AMPS TYPE SO CABLE SIZE PLUG SIZE
1-PH 3-PH 1-PH 3-PH 1-PH 3-PH
FSP-3120-1 208 3150 15.14 N/A 14/3 N/A 20A/250V/3 WIRE N/A
FSP-3124-1 240 3150 13.13 N/A 14/3 N/A NEMA L6-16 N/A
FSP-3127-1 277 3150 11.37 N/A 16/3 N/A NEMA L7-17 N/A
FSP-3148-1 480 3150 6.56 N/A 16/3 N/A NEMA L8-20 N/A
FSP-3157-1 600 3150 5.48 N/A 16/3 N/A NEMA L9-20 N/A
FSP-4320-3 208 4300 20.67 11.94 12/3 14/4 30A/250V/3 WIRE 20A/250V/4 WIRE
FSP-4324-3 240 4300 17.91 10.36 14/3 14/4 30A/250V/3 WIRE 20A/250V/4 WIRE
FSP-4327-1 277 4300 15.52 N/A 14/3 N/A 20A/480V/3 WIRE N/A
FSP-4348-3 480 4300 8.96 5.18 16/3 14/4 20A/480V/3 WIRE 20A/480V/4 WIRE
FSP-4357-3 600 4300 7.48 7.48 16/3 14/4 20A/600V/3 WIRE 20A/600V/4 WIRE
FSP-9520-3 208 9500 45.67 26.39 6/3 8/4 60A/250V/3 WIRE 20A/600V/4 WIRE
FSP-9524-3 240 9500 39.58 22.89 8/3 10/4 50A/250V/3 WIRE 30A/250V/4 WIRE
FSP-9527-1 277 9500 34.3 N/A 8/3 N/A 50A/480V/3 WIRE N/A
FSP-9548-3 480 9500 19.79 11.44 12/3 14/4 30A/480V/3 WIRE 20A/480V/4 WIRE
FSP-9557-3 600 9500 16.52 9.54 14/3 14/4 20A/600V/3 WIRE 20A/600V/4 WIRE