The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Industrail Control Panel bonding per 409.108
by sparkyinak
Yesterday at 03:17 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
sparkyinak 8
Trumpy 6
Who's Online
0 registered (), 192 Guests and 6 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#72693 - 12/07/06 01:35 PM 240 to 120 Volt Step-down Transformer
wendel Offline
Member

Registered: 08/07/04
Posts: 57
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.

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#72694 - 12/07/06 02:17 PM Re: 240 to 120 Volt Step-down Transformer
earlydean Offline
Member

Registered: 12/22/03
Posts: 749
Loc: 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

Top
#72695 - 12/07/06 03:01 PM Re: 240 to 120 Volt Step-down Transformer
ShockMe77 Offline
Member

Registered: 06/11/05
Posts: 823
Loc: Rahway, New Jersey
Couldn't you just reconfigure the termination points inside the panel?

Top
#72696 - 12/07/06 03:45 PM Re: 240 to 120 Volt Step-down Transformer
JBD Offline
Member

Registered: 07/12/01
Posts: 599
Loc: WI, USA
 Quote:
that's reasonably priced


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

Top
#72697 - 12/07/06 05:01 PM Re: 240 to 120 Volt Step-down Transformer
Jps1006 Offline
Member

Registered: 01/22/04
Posts: 609
Loc: Northern IL
Your not using this to minmize voltage drop for your saw are you?

Top
#72698 - 12/07/06 05:28 PM Re: 240 to 120 Volt Step-down Transformer
wendel Offline
Member

Registered: 08/07/04
Posts: 57
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?

Top
#72699 - 12/08/06 03:11 PM Re: 240 to 120 Volt Step-down Transformer
Rewired Offline
Member

Registered: 01/01/06
Posts: 567
Loc: 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 ). 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

Top
#72700 - 12/08/06 03:46 PM Re: 240 to 120 Volt Step-down Transformer
SolarPowered Offline
Member

Registered: 07/05/04
Posts: 615
Loc: Palo Alto, CA, USA
How about using a 10 gauge extension cord plugged in as close to the panel as possible?

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals