rtwi2 Posted February 18, 2012 Report Share Posted February 18, 2012 I recently moved into a house that had a tub install and removed. There is a 240V/60A breaker in the main panel of the house. There is a 240V/60A sub-panel near were the tub was installed. I am looking at several smaller tubs and they seem to want a 240V/50A sub-panel. How much electrical work is involved in getting one of the tubs? Could I just have a 240V/50A sub-panel installed. Does the breaker in the main box have to be sized down? I assume that the wire is sized appropriately for 60A so the wires should be over sized for 50A. Quote Link to comment Share on other sites More sharing options...
Dr. Spa Posted February 18, 2012 Report Share Posted February 18, 2012 Could I just have a 240V/50A sub-panel installed. yes Does the breaker in the main box have to be sized down? no Quote Link to comment Share on other sites More sharing options...
david_bilton Posted February 18, 2012 Report Share Posted February 18, 2012 I recently moved into a house that had a tub install and removed. There is a 240V/60A breaker in the main panel of the house. There is a 240V/60A sub-panel near were the tub was installed. I am looking at several smaller tubs and they seem to want a 240V/50A sub-panel. How much electrical work is involved in getting one of the tubs? Could I just have a 240V/50A sub-panel installed. Does the breaker in the main box have to be sized down? I assume that the wire is sized appropriately for 60A so the wires should be over sized for 50A. or change out just the breaker in the box Quote Link to comment Share on other sites More sharing options...
rtwi2 Posted February 18, 2012 Author Report Share Posted February 18, 2012 I was just going to follow up on changing the breaker in the sub-panel. The current sub-panel has 4 expansion slots two of which are filled with the current 60amp breaker. The Hotsprings model that I am looking at requires 2 breakers, a 30A and a 20A. My take is that the current sub-panel may be viable if additional wires are pulled through the whip. But I am not sure. Quote Link to comment Share on other sites More sharing options...
njmurvin Posted February 21, 2012 Report Share Posted February 21, 2012 I thought the HS spas came with their own disconnect box. Couldn't you just change the breaker in the sub-panel and then wire the disconnect to that panel? Quote Link to comment Share on other sites More sharing options...
rtwi2 Posted February 26, 2012 Author Report Share Posted February 26, 2012 We had the breakers taken out the the HS disconnect box put into the existing sub-pannel and added a couple of wires from the new breaker to the end of the whip. All in all very painless, the electrician was in and out in about an hour. Quote Link to comment Share on other sites More sharing options...
n1oty Posted February 29, 2012 Report Share Posted February 29, 2012 One thing to watch out for with regard to the existing wiring that is retained. HS requires that all conductors must be rated at least 75 C. A lot of older 60 amp tubs were wired with NM-B, a 60 C rated conductor. If so, you may want to change it so you do not potentially jeopardize your warranty. On the other hand, if it is THHN or any of the other 75 C or 90 C conductors, you should be all set. John Quote Link to comment Share on other sites More sharing options...
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