I Have A New Hot Tub And A Old House With No Ground In The Main Panel Box.
Can I Install A Grounding Rod Just For The Hot Tub Ground Or Do I Need To Bond It To The Main Panel.the Old Panel Has No Spot For The Ground .the Hot Tub Hook Up Is Two Hots And A Ground Wire No Common.does My New Ground Need To Be Bonded To My Common Bus In The Main Panel. I Have No Disconnect For My Main Panel It Goes From The Street To The Main Panel.I Have A 50 Amp Breaker In The Main Panel For The Hot Tub .the Circuit Was It Was For The Stove And I Do Not Need It Anymore.I'm Going From The Main Panel 50 Amp Breaker To A 50 Amp Gfi Panel 5 Feet From The Hot Tub.can I Hook The Ground To The 50 Gfi By The Hot Tub.

First, a ground rod does not need to be at the main panel, It may be at the meter, which is fine, as the Main Disconnect may be at the meter location. Even if the main is not at the meter, the grounding may be at the meter.

Do not just drive another ground rod. Look closely for grounding of the neutral at some other location. If there is none, before you proceed with connecting the hot tub, this grounding issue needs to be investigated and addresses.

You may be correct that the hot tub only needs two hots and an equipment ground, but most tubs I am familiar with also need a neutral, as the motors are usually 120 volts. Just something that should be confirmed.

Grounding the neutral can be done with a ground rod or two, or can be a ground wire from the neutral bar at the main disconnect and/or meter going to a city water line.