Why are certain other underfloor heating elements (mainly heating wires) constructed with a metallic sheath or shield around the heating element, while MOHAWK heating elements are not?
The fact is that the additional metallic shield is not a significant factor in the prevention of electrical shock hazard. The risk at issue is a person (a baby, a child or adult) inadvertently punching a metallic object like a nail or needle through the floor covering (carpet or wood) and into the electricity carrying metallic heating ribbon. The resulting physical effects on the person will be similar to the effects created by sticking the same object into a common electrical socket in the house. In the latter case there is no other way to protect the person from a shock hazard except by using a GFCI (Ground Fault Circuit Interrupter). All underfloor heating mats needs to be connected to a GFCI which is an integral part of our thermostats line. This is the reason why all the applicable standards, codes and practices require the mandatory incorporation of a GFCI in the electrical circuitry of an electrical under-floor heating system, while leaving the alternative of including a metalli
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