ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Dimmable LED 2x4 lay in fixtures
by Potseal. 04/23/17 07:18 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
How do you find a good employee?
by HotLine1. 04/22/17 10:44 AM
Electrode boilers question
by SteveFehr. 04/21/17 08:32 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,654 Are you busy
169,347 Re: Forum
162,687 Need opinion
Who's Online Now
0 registered members (), 75 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#72693 - 12/07/06 05:35 PM 240 to 120 Volt Step-down Transformer  
wendel  Offline
Member
Joined: Aug 2004
Posts: 55
Would someone recommend a step-down transformer for going from 240 volts to 120 volts that's reasonably priced. I only need about 10 amps on the 120 volt side.


Work Gear for Electricians and the Trades

#72694 - 12/07/06 06:17 PM Re: 240 to 120 Volt Step-down Transformer  
earlydean  Offline
Member
Joined: Dec 2003
Posts: 751
Griswold, CT, USA
Is your load variable or constant?

If it is constant, hook it in series with the right size resistor (or an identical load).


Earl

#72695 - 12/07/06 07:01 PM Re: 240 to 120 Volt Step-down Transformer  
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
Couldn't you just reconfigure the termination points inside the panel?


#72696 - 12/07/06 07:45 PM Re: 240 to 120 Volt Step-down Transformer  
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
Quote
that's reasonably priced


Reasonably priced for the seller is often not the same $$$ as for the buyer.


#72697 - 12/07/06 09:01 PM Re: 240 to 120 Volt Step-down Transformer  
Jps1006  Offline
Member
Joined: Jan 2004
Posts: 615
Northern IL
Your not using this to minmize voltage drop for your saw are you?


#72698 - 12/07/06 09:28 PM Re: 240 to 120 Volt Step-down Transformer  
wendel  Offline
Member
Joined: Aug 2004
Posts: 55
Jps1006, that's exactly what I want to do. I have 240 volts available on the exterior of the house with long distances for tree trimming. I've fried a few saw motors already even being kind as far as letting them cool after a minute of use. I attribute my woes to too much current draw due to low voltage(120) at the end of the 100 foot extension chord and who knows how many receptical hops inside the house with all connections being push-in, not screwed. Am I crazy?


#72699 - 12/08/06 07:11 PM Re: 240 to 120 Volt Step-down Transformer  
Rewired  Offline
Member
Joined: Jan 2006
Posts: 558
Hamilton, Ontario, Canada
Um, what kind of saw / motor is it?

I do understand where you are coming from in regards to voltage drop just through the house wiring "receptacle hops"...
My neighbour can NOT start his air compressor in his garage on the best of days... Lights dim, motor hums and the breaker trips ( yes its an FPE also [Linked Image]). Neighbour on the other side tried my electric pressure washer with similar results. Both times they were plugged in at the end of a 14 gauge circuit that was at the opposide end of the house from the panel and picked up a multitude of outlets with connections "under the screws" I might add in its 18 mile travel path around the house... Plug either of those motors into the outlet I have on the side of this house, opposite to where the service is and the ONLY outlet on the circuit, wired with #12 and these motors start and run without any problem, even if they are plugged into a cord..

So No I dont think your crazy, the wiring inside your house may not be helping either!

A.D


#72700 - 12/08/06 07:46 PM Re: 240 to 120 Volt Step-down Transformer  
SolarPowered  Offline
Member
Joined: Jul 2004
Posts: 625
Palo Alto, CA, USA
How about using a 10 gauge extension cord plugged in as close to the panel as possible?



Member Spotlight
Scott35
Scott35
Anaheim, CA. USA
Posts: 2,707
Joined: October 2000
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.013s Queries: 14 (0.003s) Memory: 0.7901 MB (Peak: 0.9499 MB) Zlib enabled. Server Time: 2017-04-24 21:06:44 UTC