240v -vs- 120v equipment wiring?
 

I am building a generator set for my shop tools and as a backup source of
power for the upcoming hurricane season here in Florida.

I've bought myself a ChangFa 22 hp diesel engine and a ST10 10Kw genhead.

Most of my big power consuming tools can either be hooked up 120v or
240v. My tools that will be hooked up to the genset will be my
Campbell Hasfeld 6hp 60gal Air compressor, Ridgid contractors table
saw. Ridgid 14" woodcutting band saw, Homier metal cutting mini-lathe,
Harbour Freight 4x6 metal cutting band saw, DeWalt 10" miter saw, not all
these will be running at once, perhaps the Air compressor and one of the
other tools at the same time.

I can change the genset to run at 120v@87amps only or can wire it to have
.

Any ideas on how best to wire this genset?

What are the benefits of running the tools at 240v, smaller wires for
power cords???

--
A7N8X-Deluxe, AMD XP2500+ (Un-locked)
2x256mb Crucial PC3200 DDR ram
Palit-Daytona Ti4200/64M AGP

SomeBody wrote in
:


What are the benefits of running the tools at 240v, smaller wires for
power cords???


Yup, half the amperage and half the power loss.



--
Anthony

You can't 'idiot proof' anything....every time you try, they just make
better idiots.

Remove sp to reply via email

http://www.machines-cnc.net:81/

"SomeBody" wrote in message
. ..

What are the benefits of running the tools at 240v, smaller wires for
power cords???


Higher voltage = less current draw (amperage) for a given power consumption.

I = P/E
Current draw = Power consumed divided by Voltage


Less current draw through your wires means less power loss due to internal
wire resistance (which also means less wire heating = longer life).

P = (I * I) / R
Power loss in wiring = Current in wiring squared divided by Resistance of
wiring


Go with the 220VAC.
I recommend running no less than 12ga wire. Also run a parallel 110VAC
circuit to power accessories like lights and other ancillary equipment.

- Michael

Any ideas on how best to wire this genset?

What are the benefits of running the tools at 240v, smaller wires for
power cords???

If you've got a way to disconnect from your main transformer. (pulling the
meter off will work but probably isn't legal)Do my method; build a heavy 220
connector extension cord jumper with double male plugs. Put a 50 amp 220
plugin on both your genset and near your fuse box. When the power goes out,
disconnect from the grid, start up your genset and plug in the jumper. Now,
your whole place has power just like before.

Back when the power company installed my meter, I asked for a disconnect.
They didn't want to install one. So I mentioned I hoped to not accidently
high side them (term for power coming back through transformer) when I
plugged in my generator and jumper. The guy went right over to the truck and
grabbed a 200 amp disconnect panel.

Karl

"Karl Townsend" remove .NOT to reply
wrote:

build a heavy 220 connector extension cord jumper with double male
plugs.

Oh my Good! I knew that there are people stupid enough to do something
like that, but to post such a suggestion?

Nick
--
"Wissenschafts"-Sendung auf einem der Privat-Kanäle:
"Der Behälter fasst 200.000 Kubik-Liter."
Wie viele Quadrat-Stunden braucht es dann wohl, um ihn voll zu bekommen?

SomeBody wrote:

I am building a generator set for my shop tools and as a backup source of
power for the upcoming hurricane season here in Florida.

I've bought myself a ChangFa 22 hp diesel engine and a ST10 10Kw genhead.

Most of my big power consuming tools can either be hooked up 120v or
240v. My tools that will be hooked up to the genset will be my
Campbell Hasfeld 6hp 60gal Air compressor, Ridgid contractors table
saw. Ridgid 14" woodcutting band saw, Homier metal cutting mini-lathe,
Harbour Freight 4x6 metal cutting band saw, DeWalt 10" miter saw, not all
these will be running at once, perhaps the Air compressor and one of the
other tools at the same time.

I can change the genset to run at 120v@87amps only or can wire it to have
.

Any ideas on how best to wire this genset?

What are the benefits of running the tools at 240v, smaller wires for
power cords???

Right off the top -

Small copper losses - lower voltage drop due to lower currents in 240.
Higher impulse for motor starts -
Martin

--
Martin Eastburn
@ home at Lion's Lair with our computer lionslair at consolidated dot net
NRA LOH, NRA Life
NRA Second Amendment Task Force Charter Founder

----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

"Tom Quackenbush" wrote in message
...
DeepDiver wrote:
snip
Less current draw through your wires means less power loss due to internal
wire resistance (which also means less wire heating = longer life).

P = (I * I) / R
Power loss in wiring = Current in wiring squared divided by Resistance of
wiring
snip

I think that should be P = I * I * R , or current squared times
resistance.


You're absolutely right. I should have proof-read my posting.

DeepDiver wrote:

"Tom Quackenbush" wrote in message
...

DeepDiver wrote:
snip

Less current draw through your wires means less power loss due to internal
wire resistance (which also means less wire heating = longer life).

P = (I * I) / R
Power loss in wiring = Current in wiring squared divided by Resistance of
wiring

snip

I think that should be P = I * I * R , or current squared times
resistance.



You're absolutely right. I should have proof-read my posting.


Simply a grammar or spelling issue - you used I before E. it was E^2 / R .

Martin

--
Martin Eastburn
@ home at Lion's Lair with our computer lionslair at consolidated dot net
NRA LOH, NRA Life
NRA Second Amendment Task Force Charter Founder

----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

SomeBody wrote:


... . ...

LOL - Mozilla Thunderbird thought this was an email address!

SomeBody wrote:


... . ...

LOL - Mozilla Thunderbird thought this was an email address!
That should be G
Ken.