I recently wired a home with a hydromassage tub. Got a call from the general that the tub needs bonding. All the piping is plastic so I thought it wasn't required, read 680.74 and then called the inspector. He told me he want a #8 from the motor lug to the EGC at the GFI. Told him it is already bonded by being plugged in to that GFI. He talked to the chief electrical inspector and 2 other electricians and they all agreed with him. Who's right? We are on the 99 NEC if it makes any difference. I only have 02 and 05 books here so I can't check that year.