King Electric TCM - Manual (Page 3)

Measure The Resistance
 Use a digital multi-meter to measure the resistance between the conductors of the mat power leads. Record these resistances on the
Cable/Mat Testing Log under section “Test Record # 1 Prior to Installation”. The resistance between the white and black lead wires
should be within the resistance range on the nameplate label. If it is a little low, it may be due to low air temperatures or meter calibra-
tion. Consult the factory if you are in doubt.
 The resistance between the white and black leads and ground lead should be “open”, usually indicated by an “OL” or whatever your meter
shows when the test leads and ground lead should be “open”, usually indicated by a reading. Record this information and contact the facto-
ry before installing. This could indicate damage, test lead problems, or a number of other issues. Try “pinning” the test leads to the cable/
mat lead wires against a hard non-metal surface if your readings fluctuate.
 Your electrician should perform an insulation resistance test on the mat. A mega ohm meter adjusted to a minimum 1000 VDC should give a
measured value at least 20 mega ohm (MΩ).
Mega Ohm meters apply high voltage and could shock or cause serious injury if improperly used. Follow mega ohm meter
instructions for safe and proper use.
IMPORTANT! Use King’s Cable Alarm Monitor during installation.
 It is recommended to use the King’s Cable Alarm Monitor (Model # FCS11) during installation. When connected,
the device will constantly monitor the heating wire during the entire installation process. If the wire is cut or
damaged during installation, this device sounds an alarm. The FCS11 will prevent burying a damaged wire be-
low hardened concrete.
Installing The Heating Cable
The TC cable must be laid out with even spacing over the entire area to be heated. To ensure an accurate and easy method of installing it is
recommended to attach to rebar or wire mesh. The heating cable can be attached directly to the rebar or wire mesh using tie wraps. Secure the
heating cable at the correct center-to-center distance. Do not secure the cable too tightly as this may damage the cable.
5.3 Center-to-center (C-C) Distance
To determine the approximate c-c distance of the TC cables, the following formula below can be used, or consult with the engineer responsible
for the building construction. To determine the
Since the length will not exactly match a standard TC cable length, select an appropriate combination of cables. Then, proceed to calculate the c
-c distance:
! WARNING
SAVE THESE INSTRUCTIONS
INSTALLATION INSTRUCTIONS
KING ELECTRIC MFG CO · 9131 10TH AVENUE SOUTH · SEATTLE, WA 98108 · PH:206 762 0400 · FAX: 206 763 7738 · www.king-electric.com