Snow-Melting Cable For concrete pavement. Self-regulating heater cable 208-277 volt AC, encased in concrete pavement for walkways, steps, loading ramps or parking garages. Based on Raychem ElectroMelt(tm) System for concrete pavement. Cable is cut to length at the site and laid in a serpentine pattern using 12-inch center-to-center spacing. Use nylon cable ties to fasten cable to the top of reinforcing before concrete is placed. For scheduling purposes estimate that a crew of one can lay out, cut to length, install and tie 600 LF of cable in an 8-hour day. Based on 1.1 LF of cable per SF of pavement, including ties, “return bends” and waste, this yields 545 SF of pavement. These costs do not include reinforcing, concrete or concrete placing. A rule of thumb for sizing circuit breakers: For startup at 0 degrees F with 220 volts AC, allow 0.20 amps per LF of cable.
Heater cable (1.1 LF per SF of pavement) CE@.015 SF 9.21 .89 10.10
Power connection kit, including end seals CE@.500 Ea 31.40 29.60 61.00
Cable splice kit CE@.250 Ea 14.70 14.80 29.50
Cable expansion joint kit CE@.250 Ea 21.90 14.80 36.70
ElectroMelt(tm) junction box CE@.500 Ea 119.00 29.60 148.60
System controller, automatic CE@1.50 Ea 2,510.00 88.80 2,598.80
Thermostat, line sensing CE@.500 Ea 257.00 29.60 286.60
Ground fault protection device CE@.969 Ea 379.00 57.40 436.40
Ice-Melting Cable For roofs, gutters and downspouts. Self-regulating heater cable 120 or 208-277 volts AC, run exposed on the surface of the roof or within gutters. Based on Raychem IceStop(tm) System for roofs and gutters. Cable is cut to length on site and laid in a serpentine pattern using 24-inch center-to-center spacing and 32-inch loop height. Fasten to the roof with Raychem clips. For scheduling purposes estimate that a crew of one can cut to length and install 400 LF of cable in an 8-hour day. Based on 1.2 LF of cable per SF of protected roof area, including clips, “return bends” and waste, this yields 330 SF of protected area. Figure each LF of gutter as equal to one SF of roof. Figure each downspout as equal to 15 SF of roof. These costs do not include the roofing, gutters, or downspouts. A rule of thumb for sizing circuit breakers: For startup at 0 degrees F with 120 volts AC, allow 0.17 amps per LF of cable. For startup at 0 degrees F with 208-277 volts AC, allow 0.11 amps per LF of cable.
Heater cable (1.2 LF per SF of protected area) CE@.033 LF 5.54 1.95 7.49
Power connection kit CE@.500 Ea 31.40 29.60 61.00
Cable splice kit CE@.374 Ea 14.70 22.10 36.80
End seal kit CE@.374 Ea 13.60 22.10 35.70
Downspout hanger CE@.374 Ea 26.20 22.10 48.30
Metal roof mounting kit CE@.500 Ea 26.20 29.60 55.80
Electrical Outlet Boxes Steel boxes installed on an exposed wall or ceiling. The material cost for phenolic, PVC and fiberglass boxes will be 50% to 70% less. These costs include fasteners but no switch or receptacle
Square outlet boxes
  4" x 4" x 1-1/2" deep with [view picture]
    1/2" and 3/4" knockouts E4@.187 Ea 1.56 9.32 10.88
    Side mounting bracket E4@.187 Ea 3.81 9.32 13.13
  4" x 4" x 2-1/8" deep with
    1/2" and 3/4" knockouts E4@.245 Ea 3.80 12.20 16.00
    Side mounting bracket E4@.245 Ea 3.65 12.20 15.85
  Add for
    1-1/2" deep extension rings E4@.120 Ea 3.47 5.98 9.45
    Romex or BX clamps Ea .54 .54
    Steel flush cover blanks E4@.039 Ea 1.66 1.94 3.60
    Plaster rings to 3/4" deep E4@.080 Ea 2.38 3.99 6.37
Octagon outlet boxes
  4" x 1-1/2" deep with [view picture]
    1/2" knockouts E4@.187 Ea 1.54 9.32 10.86
    Mounting bracket, horizontal E4@.187 Ea 4.74 9.32 14.06
  4" x 2-1/8" deep with
    1/2" and 3/4" knockouts E4@.245 Ea 6.44 12.20 18.64

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