King Electric SCM - Manual (Page 12)

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Installation for Concrete Application:
Step 1: Attach reinforcement, such as wire mesh or rebar, over the base at about 2” to 3”
below the level of the intended top surface. You must use “chairs” or other appropriate objects
to raise the wire mesh to the correct level. The SC/SCM cable/mat will be attached to this rein-
forcement later. It is very important for the cable to be completely embedded in concrete.
Protect or remove sharp protrusions by bending them over, capping, or cutting. Sharp edges
may damage the heating cable.
Step 2A: (For SC cable Installation) Begin securing the heating cable at the desired spacing to
the reinforcement mesh or rebar using plastic cable ties. These cable ties should be applied
roughly every 12” and also at the ends of each run. Turn the cable ends downward so they will
not poke up through the surface layers. Do not use metal ties as they may damage the cable.
Step 2B: (For SCM Mat Installation) Begin laying out and securing the mat about every 12” to the reinforcement mesh or rebar using plastic ca-
ble ties around the heating cable. Turn the cable tie ends downward so they will not poke up through the surface layers. Do not use metal ties as
they may damage the cable.
If installing on top of existing slab, secure the mat by nailing through the tape every 2 ft. or so. NEVER strike the heating cable with a hammer.
IMPORTANT Expansion Joints: SC heating cable must never be run through an expansion joint. Doing so may cause damage to the cable
with slab movement. It is recommended to lay the mat so these joints are avoided.
However, if it is necessary, a portion of the heating cable may be dropped into the grade below the expansion joint as shown below. ( Fill around
the cable with at least 1” thick sand. The loop of the heating cable should be long enough to allow flexing, and must not be embedded into the
concrete (the sand will protect this) since this would not allow the cable to flex with slab movement.
SAVE THESE INSTRUCTIONS
INSTALLATION — CONCRETE
KING ELECTRIC MFG CO · 9131 10TH AVENUE SOUTH · SEATTLE, WA 98108 · PH:206 762 0400 · FAX: 206 763 7738 · www.king-electric.com