Thermon HSX - Manual (Page 6)

6
WarmTrace
TM
HSX
Maximum Circuit Length vs. Circuit Breaker Size
Maximum Circuit Lengths. . .
To prevent excessive electrical currents at the branch circuit
breaker supplying power to the heating cable, the maximum
circuit length as shown in the chart below must be observed.
Notes:
1. These maximum circuit lengths are defined as the total length of cable that
can be fed from a single power connection point, inclusive of all splices.
2. Be sure to verify the available amperage of the branch circuit breaker sup-
plying power to the heat tracing.
3. If the power supply voltage will be different than that listed in the chart
above, contact Thermon or your local Thermon representative before install-
ing any cable.
4. Any number of shorter heat tracing circuits can be energized from a single
branch circuit breaker as long as the total length of heating cable does not
exceed the length stated above for a given branch circuit breaker's amper-
age rating.
Completing the Installation. . .
1. Begin final cable attachment by securing the end-of-circuit
termination kit and working back toward the power supply.
• Circumferential bands of tape should be installed at
300 mm (12") intervals to keep the cable in proper con-
tact with pipe.
• If applicable, refer to installation details provided with the
project drawings or contract Thermon for additional infor-
mation regarding installation.
2. Complete splice connections (if required) in accordance
with the installation instructions provided with the splice kit.
3. Install power connection kit in accordance to detailed instal-
lation instructions provided with the kit.
4. Before making power connections, repeat the megger test
with at least a 500 Vdc megohmmeter (megger) between
the heating cable bus wire and heating cable metallic braid.
IEE 515.1 recommends that the test voltage for polymer in-
sulated heating cable be at 2500 Vdc. The minimum accept-
able level for the megger reading for any polymer insulated
heat tracing cable is 20 megohms. (Record 2 on Cable Test-
ing Report)
Wall or Floor Penetrations: The heating cable must be pro-
tected when passing between floors or through a wall. This can
be accomplished with pieces of conduit or channel. If penetra-
tion requires fire protection, the conduit or channel may be
caulked with approved caulking material.
Catalog No. Voltage
Breaker Size
15 Amp 20 Amp 30 Amp
HSX 2105-2(Blue) 208
331 m
(1085')
366 m
(1200')
366 m
(1200')
HSX-2120-2 (Green) 208
146 m
(480')
195 m
(640')
293 m
(960')
HSX-2140-2 (Red) 208
84 m
(275')
113 m
(370')
169 m
(555')
Floor or Wall
Hot Water Pipe
Channel
Heater Cable