Warmup NAMSRK Series, NAMSRK-6FT, NAMSRK-12FT, NAMSRK-18FT, NAMSRK-24FT Quick Start Manual

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The w

orld’s best-selling electric floor heating brand

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The w

orld’s best-selling electric floor heating brand

WARMUP INC.

USA: [e-mail]
Tel.: [phone]
www.warmup.com

CANADA: [e-mail]
Tel.: [phone]
www.warmup.ca

NAMSRK INSTALLATION INSTRUCTIONS
FOR PIPE FREEZE PROTECTION

DESCRIPTION

Warmup NAMSRK preassembled and pre-terminated cables
are intended for use on metal or plastic water pipes for freeze
protection of these pipes in residential, mobile home or other
ordinary area installation applications.
The cables are provided in 6, 12, 18, 24, 50, 75 and 100 foot
lengths which include a factory sealed power connection
with 30 inch power cord and plug, and a factory sealed end
termination.

PACKAGE CONTENT

1 NAMSRK preassembled electric heating cable

OTHER ITEMS REQUIRED FOR PROPER
INSTALLATION

• Thermal insulation (fiberglass or equivalent)

• GFI protected power receptacle

CONDITIONS OF USE

NAMSRK cables are designed for use in residential, mobile
home or other ordinary area installation applications on
the outside of metal or plastic piping only.
This electric heating cable is designed to be used in
conjunction with suitable thermal insulation and connected
to a an outlet with ground fault circuit interruption.

Please review the following cautions related to the use
of the NAMSRK preassembled cable.

CAUTION: ELECTRIC SHOCK AND/
OR FIRE HAZARD.

1. Do NOT use the NAMSRK cable in classified hazardous
areas. This product is approved for ordinary area use only.

2. Do NOT use the NAMSRK cable for underground or buried
pipe applications.

3. Do NOT use the NAMSRK cable for flexible hose or flexible
piping applications. This product is approved for used on
fixed metal and plastic piping only.

4. Do NOT install the NAMSRK cable without use of
proper thermal insulation and protective weather barrier.

5. Do NOT use the

NAMSRK cable for piping installations
behind walls, in ceilings, through flooring or any other
inaccessible locations.

6. Do NOT use the NAMSRK cable directly INSIDE pipes.
This product is approved for use installed on the OUTSIDE
of metal and plastic pipes only.

7. Do NOT use the NAMSRK cables on piping that may
exceed 85 deg C.

8. Do NOT use the NAMSRK cables on piping that contains
fluids other than water. This product is approved for use
on pipes containing water only.

9. Do NOT use an extension cord with the NAMSRK cables.

These heating cables provide protection from damage due to
the freeze and thaw cycles on pipes, roofs and gutter systems.
For Roof & Gutter installation instructions, please refer to the
relevant document.
The cables automatically adjust heat output according to the
ambient temperature conditions. Under cooler conditions the
heat output increases, and as the temperature rises the output
decreases to save on energy. The cables are available in

various pre-assembled lengths.

GENERAL INFORMATION

TOOLS REQUIRED

• 2500 VDC megger - used to test electric heating
cable insulation resistance.

APPROVALS

NAMSRK preassembled heating cables are ETL approved
for use in residential and mobile home pipe freeze
protection applications.

VALVE

HEATING CABLE

PIPE

™

The w

orld’s best-selling electric floor heating brand

WARMUP INC.

USA: [e-mail]
Tel.: [phone]
www.warmup.com

CANADA: [e-mail]
Tel.: [phone]
www.warmup.ca

™

The w

orld’s best-selling electric floor heating brand

NAMSRK INSTALLATION INSTRUCTIONS
FOR PIPE FREEZE PROTECTION

GENERAL

GFI CIRCUIT PROTECTION - To minimize danger from possible sustained electrical arcing due to damaged or improperly

installed heating cable, and to comply with agency certifications and the National Electric Code (Article 427) - Ground Fault
Equipment Protection must be used on each heating cable branch circuit. Arcing may not be stopped by conventional circuit
protection. Contact a qualified electrician for installation if GFI is not available.

WARNING:
ELECTRIC SHOCK AND/OR FIRE HAZARD. If cable is damaged, remove from service. Do not attempt to repair. There are no user

serviceable parts. Replace damaged cable with new assembly.

KEEP INSTRUCTIONS FOR FUTURE REFERENCE.

IMPORTANT NOTES ON CABLE SELECTION

• For any “non-Standard” installations please contact Warmup at [phone] (US) or [phone] (Canada).

• We assume a minimum ambient temperature of 0°F and a thermal insulation of thick fiberglass wrap or equivalent.

For protection to -20°F minimum ambient use 1” thick fiberglass wrap or equivalent.

• Add 1 foot of heating cable for every valve or spigot in the pipeline - make sure to apply this extra cable at each valve/

spigot when installing.

• If your selected cable length is longer than your pipe length, spiral the cable evenly along the length of pipe.

• NAMSRK has a 5W/lin ft output. Ensure all metal pipes get 5W/lin ft.

• For 2” pipes and each 2” in diameter, double the output.

• Por plastic pipes, consider 25% more heat required.

Code Length in ft Voltage

Power output on pipe at 40°F

(5°C) in W

Power output on pipe at 50°F

(10°C) in W

Power output in ice & snow at 32°F

(0°C) in W

NAMSRK-6FT 6 110-120 36 30 60

NAMSRK-12FT 12 110-120 72 60 120

NAMSRK-18FT 18 110-120 108 90 180

NAMSRK-24FT 24 110-120 144 120 240

NAMSRK-50FT 50 110-120 300 250 500

NAMSRK-75FT 75 110-120 450 375 750

NAMSRK-100FT 100 110-120 600 500 1000

SPECIFICATIONS

Service voltage 110-120V

Normal cable width (in/mm) 0.42 (10.6)

Normal cable thickness (in/mm) 0.23 (5.8)

Cable bus wire gauge (AWG) 16

Cold lead length (in/mm) 30 (762)

Min. Circuit breaker size (Amps) 15

Max. Exposure Temperature 185°F (85°C)

Electrical classification Nonhazardous

Nominal Power Output Chart