Talk to the owners find out what their future plans are. If it is not required, tell them it would be way more expensive to go back and replace it. Let them make the call. If Art. 547 does not apply, it does not mean you can not still use it providing it does not violate other requirements. Be sure to put in your quote that you discussed with them and they declined. Reason being, years down the road, they decide to put in electrical equipment and something go wrong. Someone gets hurt, the finger pointing will start and the finger will be pointed at you. Odds are, nothing will ever happened, by documenting it, C.Y.A. and it takes only a few seconds.
