The 2008 code code book says GFI protection is required for boat hoists not exceeding 240 volts. In the handbook it goes into further detail about only circuits that are 15 or 20 amps. So what do you go by the handbook or the code book. Case in point I wired a boat lift with a 30 amp 2-pole breaker which is what was called for. I was turned down because it was not a gfi. the code book says not exceeding 240 volts. i argued the handbook differs and says only 15 and 20 amp. This is a home and not commercial work. Thanks in advance