customer bought a hottub from china 50hz
- Thread starter zappy
- Start date
- Status
brantmacga
Señor Member
- Location
- Georgia
- Occupation
- Former Child
nuff said.
quogueelectric
Senior Member
- Location
- new york
As long as it doesnt have a clock on it. It will not keep good time.
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
The pump motors will run a bit faster, and the filter pump(s) will constantly change what time of day they run due to the timer gaining time.
electricalperson
Senior Member
- Location
- massachusetts
how much did the chinese hot tub cost
- Location
- Illinois
- Occupation
- retired electrician
If the pump was designed for 50hz and you are running it at 60hz it will be doing more work and likely trip the overloads if there are any.
- Location
- Illinois
- Occupation
- retired electrician
It looks like the horsepower requirements for a centrifugal pump changes with the cube of the change in speed. That would require 1.7 times as much horsepower when you run the 50hz pump motor on 60hz.
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
Yea, like they would put in overloads. It should be just like running it on a freq drive, except speeding it up instead slowing it down, amp draw would increase some. Just hit me, install a freq drive to run the motors and your problem is solved! Lets see X# of freq drives plus installation, that cheap hot tub just got expensive.:grin:don_resqcapt19 said:
norcal said:
Yes, a lot of Hot tubs are not tested or labled, and they get by the inspection process, because the homeowner or installer never files for a permit, they just don't get the liability issues, every year we get a dozen or so calls asking what we can do, the city inspector turned down the installation, there is not much we can do, except advise the Ho to return the tub. then they go on to tell you they bought it from a big company that advertises on TV so they must be labled and approved.
- Location
- Massachusetts
satcom said:
I can find nothing in the NEC requiring a Hot tub to be listed.
Most inspectors will insist on third party certification (UL,FM,Etl etc.) Inspectors inspect for many reasons but safety is probably number one. Section 90.4 gives inspectors the responsibility for deciding on the approval of equipment and materials. As an inspector I require third party certification. The testing involved in listing and labeling equipment is well beyond my capibilities. When I see a UL sticker on a piece of equipment not just the internal componets I know that it is listed as a package. Now we can go to section 110.3(B). As an electrician the code does not say that a hot tub shall be listed but most inspectors will require third party certification. How many electricians would hook a piece of equipment (Hot Tub) that was homemade in a neighbors garage?
- Location
- Massachusetts
SEO said:
I don't know how you can speak for most inspectors. :smile:
What other items do you require to be listed that the NEC does not?
I don't know of any that would not require third party certification. I can't speak for anyone except myself. I follow the NEC for all electrical equipment that needs to be listed but when I run into an unusual case I'll use section 90.4 and require third party certification. I do not have a specific list of items that I require to be listed.iwire said:
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