Yes but it won't apply to the US or at least i don't think it does. In Canada if you are a registered business the electrical wiring in the place of business MUST be certified by an electrician. The penalty is HUGE if something goes wrong (if there were a fire and someone died regardless if the flexwatt was at fault you could be charged with criminal negligence causing death which is 25 to life in prison.) It is a criminal offence to fail to do so. This makes flexwatt for business very costly as an electrician is needed to make the connections. I paid a flat fee for each connection so the more the more the fee would be.

The extra cables means more connections and more places to have problems, thus is easier to manage. KISS method simple sometimes is easier. There are pros and cons to having individual layers separate cleaning would be far simpler, if I could kill the power to one tub and not the whole thing.