Circuit Design – Expanded Kits

Electrical Connections

SnowMeltz Expanded System Circuit Design

In order to ensure proper load balancing on circuits, the SnowMeltz expanded kits have been designed to use combinations of mats on specific circuits:

SnowMeltz® Large Mat Kits

Heatizon Part Number Circuit
Number/
Amperage		 Mats Amps Per
Mat @ 240V		 Amps Per
Circuit @ 240V		 Mat(s) Square Footage Mat
Dimensions
SM-50W277-37W240-200 1 – 20A SM-50W277-37W240-100 15 15 100 2’x50′
2 – 20A SM-50W277-37W240-100 15 15 100 2’x50′
SM-50W277-37W240-220 1- 30A SM-50W277-37W240-50 7.7 17 50 2’x25′
SM-50W277-37W240-60 9.3 60 2’x30′
2 – 30A SM-50W277-37W240-50 7.7 17 50 2’x25′
SM-50W277-37W240-60 9.3 60 2’x30′
SM-50W277-37W240-240 1- 30A SM-50W277-37W240-60(x2) 9.3 19 60 2’x30′
2- 30A SM-50W277-37W240-60(x2) 9.3 19 60 2’x30′
SM-50W277-37W240-270 1- 30A SM-50W277-37W240-60 9.3 21 60 2’x30′
SM-50W277-37W240-75 11.6 75 2’x37′
2- 30A SM-50W277-37W240-60 9.3 21 60 2’x30′
SM-50W277-37W240-75 11.6 75 2’x37′
SM-50W277-37W240-290 1 – 30A SM-50W277-37W240-60 9.3 22 60 2’x30′
  SM-50W277-37W240-85 13.1 85 2’x43′
2 – 30A SM-50W277-37W240-60 9.3 22 60 2’x30′
  SM-50W277-37W240-85 13.1 85 2’x43′
SM-50W277-37W240-300 1 – 30A SM-50W277-37W240-75(x2) 11.6 23 75 2’x37′
2 – 30A SM-50W277-37W240-75(x2) 11.6 23 75 2’x37′
SM-50W277-37W240-320 1 – 40A SM-50W277-37W240-75 11.6 25 75 2’x43′
SM-50W277-37W240-85 13.1 85 2’x50′
2 – 40A SM-50W277-37W240-75 11.6 25 75 2’x43′
SM-50W277-37W240-85 13.1 85 2’x50′
SM-50W277-37W240-340 1 – 40A SM-50W277-37W240-85(x2) 13.1 26 85 2’x43′
2 – 40A SM-50W277-37W240-85(x2) 13.1 26 85 2’x43′
SM-50W277-37W240-370 1 – 40A SM-50W277-37W240-85 13.1 29 85 2’x43′
SM-50W277-37W240-100 15.4 100 2’x50′
2 – 40A SM-50W277-37W240-85 13.1 29 85 2’x43′
SM-50W277-37W240-100 15.4 100 2’x50′
SM-50W277-37W240-380 1 – 40A SM-50W277-37W240-60 9.3 30 60 2’x30′
SM-50W277-37W240-130 20 130 2’x65′
2 – 40A SM-50W277-37W240-60 9.3 30 60 2’x30′
SM-50W277-37W240-130 20 130 2’x65′

SnowMeltz® Jumbo Mat Kits

Heatizon Part Number Circuit
Number/
Amperage		 Mats Amps Per
Mat @ 240V		 Amps Per
Circuit @ 240V		 Mat(s) Square Footage Mat
Dimensions
SM-50W277-37W240-410 1 – 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
2 – 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
SM-50W277-37W240-615 1- 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
2- 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
3- 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
SM-50W277-37W240-820 1 – 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
2 – 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
3 – 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
4 – 40A SM-50W277-37W240-75 11.6 32 75 2’x37′
SM-50W277-37W240-130 20 130 2’x65′
SM-50W277-37W240-1040 1 – 50A SM-50W277-37W240-130 20 40 75 2’x65′
SM-50W277-37W240-130 20 130 2’x65′
2 – 50A SM-50W277-37W240-130 20 40 85 2’x65′
SM-50W277-37W240-130 20 100 2’x65′
3 – 50A SM-50W277-37W240-130 20 40 60 2’x65′
SM-50W277-37W240-130 20 130 2’x65′
4 – 50A SM-50W277-37W240-130 20 40 60 2’x65′
SM-50W277-37W240-130 20 130 2’x65′

Important: DO NOT OVERLOAD CIRCUITS!
Follow the load balancing chart to ensure the appropriate loads are on specific
circuits. It is also important to use properly sized breakers to be able to achieve the
desired amount of power required.

When installing SnowMeltz multiple mat systems, be sure to keep track of which mat is going to
the appropriate circuit. Mark the cold leads and/or note resistance to keep track.

The use of junction boxes may be required to extend cold leads back to either the activation
device or to the contactor panel. Extending/junctioning cold leads MUST be done in accordance
with the National Electric Code and any/all local codes. Be sure to note the amps per mat/circuit
in order to determine the appropirate conductor and junction box to use. Any junction box used
outside MUST be outdoor-rated.

Do not make ANY connections inside of the following activators:

  • M326A/2Z
  • M326ARS/2Z

All electrical connections for these devices MUST take place outside of the device, in a
outdoor-rated junction box with adequate space for all connections

Electrical Connections

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