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15
7. Installation (Continued)
• Two Pour Asphalt:
In this installation a binder or base coat of asphalt is layed down and an
additional asphalt layer is placed on top of the heating cable. The base coat is to be rolled
smooth in preparation of the heating cable installation. Welded wire mesh can be used to
install loose cables in a grid. The grid can be secured to the base coat slab using stakes. If using
a heating cable in mat form, the mats can be layed out on the base coat slab and secured
down using the mesh portion of the mat and not the heating cable. Cold leads should be
sleeved for this installation following conductor fill and size requirements in the NEC and CEC.
The heating cable portion and cold connection can not pass into the conduit sleeve. Jumpers
must be used to protect the heating cable where any and all joints are present. Do not cross
expansion joints.
• Single Pour Asphalt:
In this installation the aggregate or base is prepared first. Once the base is
prepared, a layer of sand or stone dust is placed over the base coat approximately 1” thick. The installer
can begin by placing a grid of welded wire fabric or landscaping stakes in preparation for the heating
cable. The heating cables or mats can be attached to the welded wire fabric, or landscaping stakes with
plastic zip ties that will not melt. Take note of layout examples on page 14 for installations requiring
jumpers. Jumpers must be used for any and all joint cable crossings. Cold leads should be sleeved
following conductor and fill size requirements in the NEC and CEC. The heating cable portion and
connection can not pass into any conduit sleeve.
Sand Bed Paver Preparation:
The
heating cable may be secured in place
by landscape stakes and plastic wire
ties, welded wire fabric and plastic wire
ties or tape. Do not compress or strain
the cable. Do not run heavy machinery,
equipment, or vehicles over the cable.
Be careful to avoid stepping on the cold
section factory connection of the cable.
• Sand Bed Installation:
In this
installation the aggregate or base is
prepared first. Cover the base with
1/2” layer of compact sand. Use
welded wire fabric or landscape
stakes to place loose heating cables
or lay the heating cable mat on the layer of sand in accordance with determined layout. Cover the
heating cable or mat with another 1/2” layer of sand. The paver installer must be careful to not walk
on the factory connection or damage the heating cable with shovels, rakes or other tools. Cold leads
should be sleeved for this installation following conductor fill and size requirements in the NEC and
CEC.
Mortar Under Stone & Tile Preparation:
The heating cable may be secured in place with pre-punched
steel straps or anchor kits purchased from your Heatizon Distributor or Representative. Do not compress or
strain the cable. Do not run heavy machinery, equipment, or vehicles over it. Be careful to avoid stepping
on the cold section factory connection of the cable.
• Mortar Bed Installation:
Anchor the heating cable in parallel runs in preparation for mortar
placement. Cold leads should also be anchored for this installation back to the exit point of the slab
and placed in conduit following conductor fill and size requirements in the NEC and CEC.
