NEVER cut or modify the heating cable in any way. This would change the cable resistance, will cause damage to the cable, and could cause cable overheating. NEVER install the heating cable under vanities with no air space beneath, bathtub platforms, free standing bathtubs with no air space beneath, kitchen cabinets and islands, appliances, or any other fixtures, or in small storage or clothing closets where various items may be kept on the floor. Excessive heat will build up in these confined spaces and may cause cable overheating. Additionally, heating cables shall not be altered in the field. If the installer or the user modifies or accidentally damages the unit, he will be held responsible for any resulting damage, and the warranty and the product certification will be void.