We make process heaters and sometimes, those are electric immersion heaters. NFPA 70b, 425.22(B) states a 48 amp limit per circuit. However NFPA 87 (which we follow for all of our other heaters) 18.104.22.168 says resistance heaters DON'T have to be subdivided into circuits of 48 amps or less. How can we decide which code to follow? We seem to be pretty divided on the issue.