Thanks again k good advice. Buying from grainger no problem my employer has an account with them that we are able to use for personal purchases. The one thing I do not understand is how to wire up a sp toggle switch or a push button switch( I for each speed)
There is 1 power sourse coming in (1 w 1 b 1g ) I do not know to wire them up to use 1 at a time depending on the speed required.
QUOTE=KeepItSimpleStupid;1892241]Yep. Just don't know your exact plans. Here is a ready made 3 position + off. Rotary Switch Manufacturer - Rotary Switches, HVAC Switch, Inductive Motor Load, Rotary Electrical Switch
In this case you would loose a speed, but it gives you 3 speeds + off. This is probably what you don't want in a work shop.
Another option is to use a HP rated wall switch to turn on the fan and an enclosure that selects the speed or you could put the speed selection at the air hander.
Other options are to use a start/stop push button switch for power. In this case when there is a power failure, the fan shuts off.
In your case, I think you'd be happier with a 4 position switch to select the speed. This is known as a 1 pole 4 position Horsepower Rated Rotary switch. Switched power goes in on one of the terminals and each winding goes to each of the other 4.
The advantage is that only one winding can be energised at a time.
If this were an industrial setting, then a NEMA 1 enclosure would be mounted on the wall with say two switches.
One is the rotary switch
The other could be a controls rated ON/OFF; or a two momentary switches in a START/STOP configuration or even a mushroom button.
But you cab use a HP rated toggle switch for the ON/OFF function like your familiar with, like this one Toggle Switch,1P,20A,Brown,Specification - Wall Switches - Switches - Electrical : Grainger Industrial Supply
, but you need to be a business to buy from Grainger.[/quote]