Your observations prompted me to check the Instruction Manuals for a Delta
10" Contractor's Saw, circa 1990 and a Delta 1HP Dust Collector, circa 2001.
Both machines are supplied with dual voltage 120/230 volt motors.

The more recent manual makes a point of the need for the conversion to be
done by "qualified electrical personnel" to include a)re-wiring the motor
for 240 volts; b)installing a 240 volt plug on the cord; and c) replacing
the single pole on/off switch with a double pole switch. However, the older
manual for the table saw describes only the motor rewiring and the plug
replacement but makes no mention of the need for a new switch. The switch
in question is a simple metal toggle mounted directly in the saw cabinet (so
I haven't dug it out to examine it's specs; parts list just says 'Switch',
438-01-628-004).

Is it possible that the switch supplied with the table saw was/is suitable
for both 120 and 240 volt operation? Is it likely that it is, in fact, DPST
to begin with; and, if so, can a DPST be used for either 120 or 240 volt
operation.

The newer, Dust Collector manual Parts List doesn't list a 220 volt switch
either and the switch design doesn't look 'generic'; instead, the manual
says: "Should you desire to have your dust collector converted for 240
volts, take your dust collector to the nearest Authorized Service Center".

David Merrill

PS Has anyone else noticed that, after some thirty-odd posts, nobody has
addressed the OP's first question regarding whether there is any real
[practical] advantage to his converting his 6" jointer from 120 to 240?
Yes, I know it's been beat to death :-) but so has the mechanics of doing
it.



"Doug Miller" wrote in message
om...
In article , Will
wrote:
You are absolutely correct in that this would be a "good thing" -- is it
indeed the law? Just because it makes sense doesn't mean it is a
requirement... LOL

Whether it's required or not is irrelevant: to do otherwise is to create a
potential, and entirely unnecessary, safety hazard.

--
Regards,
Doug Miller (alphageek at milmac dot com)

Nobody ever left footprints in the sands of time by sitting on his butt.
And who wants to leave buttprints in the sands of time?