ranco wiring

[wlockwood]

how does this get wired?

I am guessing that these are the load side
nc-norm closed
no-norm open
c-common

and the 120,240, common are the line in.

[klickcue]

http://powersbrewery.home.comcast.net/~ ... etcdoc.pdf

If you scroll down the page, you will notice a wiring diagram.

If you are controlling a 120 volt AC circuit like a refrig, you will use the 120 volt AC side of the Ranco.

The wires of a 120 volt AC circuit are as follows:
White is neutral
Black is hot (power)
Green is ground

An easy to remember saying:
White to light
Black to dark.
So on a 120 volt wall plug or receptacle, White will go to the Silver screw. Black will go to the Brass or darker screw and Green will go to the Green screw or long center grounding connector.

On the Ranco:
For the wall plug side!
White will go to the Common screw
Black will go to the 120 volt screw
The Green wires from the wall plug and the plug for the refrig will twisted together and a Scotch-Loc (insulator) screwed over the top.

A jumper from the Black 120 volt wire will also go to the Common of the Relay.

The plug for the refrig:
The White lead goes to Common
The Black lead goes to the NO screw of the relay.

You could also hook a spare White wire to the Common of the 120 volt Input and twist the White wires from the wall plug and the receptacle together with the spare White wire to make for an easier install.

Do you understand?

[klickcue]

By the way, I might add:

The Ranco relay will handle a 15 Amps Max Resistive load on the NO contact. As in a water heater element for a hot stick or a Lauder-Tun temperature element.

The Inductive load such as a refrigerator is 16 Amps Max on the NO contact. This will handle most refrigerators but one should check the name plate on the refrigerator or freezer for the full load current draw for the appliance.

[wlockwood]

I'm going with diagram 4 unless you object.
The line in and load side are both 120v.


Thanks Chris

[klickcue]

Good on #4.

A #14 AWG extension cord (covers the ampere requirements) is generally cheap by the time the power ends and wire are figured up and saves some time. A short section can also cut out of the center of the cord for hookup/jumper wire.

Enjoy your new Ranco!

[wlockwood]

thanks Chris, it is exactly like yours.
I'm hoping to run an electric HLT with it, just a few more parts.
The goal is to have it on a timer so its ready when I want.
Any ideas about the timer?

[klickcue]

The maximum heater element wattage for your unit will be a 1500 watt element. A 1500 watt element will draw 12.5 amps of current at 120 volts.

The maximum resistive load for the Ranco is 15 amps max. A 2000 watt element would draw 16.67 amps for example

You should be able to buy a 24 hour timer rated at 15 amps at Home Depot for about $13. Home Depot also sells resistive hot water element replacements. Make sure you select a 120 volt unit and not a 220 volt unit.

[Jdl973]

I just wired an AC unit to a ranco (120V) for my walk-in cooler I just built in my basement. I have Pics if anyone is interested of the wiring. New to the site, is there a way to inbed pics with posst, or do they have to be stuck in a gallery?

the Renco is working like a champ. the only issue i am having is with humidity (60%+) as three of the walls are concrete. trying a couple of things to fix it. the cooler is 10x6x8 and is holding a constant 45.


let me know if anyone is interested in the pics, have a "how to" on the entire project.

Jason