ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Chinese wire symbols?
by Texas_Ranger. 05/19/19 03:09 PM
Pool - Daisy chained GFCI
by gfretwell. 05/18/19 01:30 PM
110.26 working clearances
by HotLine1. 05/14/19 02:08 PM
Parallel SER Cables
by George Little. 05/03/19 05:42 PM
Norwegian power?
by dsk. 05/03/19 04:30 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 4 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
5 ohm speed pot wiring #200874
04/23/11 10:42 PM
04/23/11 10:42 PM
L
lite bulb  Offline OP
Member
Joined: Feb 2006
Posts: 78
wilm,de.
I have a 5 ohm speed pot to wire I ran a three wire shielded cable red, black, white, what is the proper color wiring.

Tools for Electricians:
Re: 5 ohm speed pot wiring [Re: lite bulb] #200875
04/23/11 11:32 PM
04/23/11 11:32 PM
N
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Not enough information. What wire goes to what pot terminal depends on how the OTHER end of the cable is connected.

If I was wiring the whole system, I would wire it as follows, just out of habit:

Red---Positive voltage
Black ---Negative voltage (or ground)
White---Pot wiper (to drive speed input signal)

Typically, the Positive supply voltage goes to the CW terminal of the pot. This way, CW rotation produces a positive output voltage, and increasing speed. But this is subject to the specifics of your installation.

If this is a speed control pot for use with a VFD or something like that, typically it is set up as a variable voltage divider across a DC reference supply, to provide a 0-5V, 0-10V, +/-5V, or +/-10V speed command signal. You should ground the shield only at the drive end, and leave it float at the pot end.

5 ohms is a very low value for a speed control pot. Are you sure you don't mean 5 kilohms (5,000 ohms)?

Last edited by NJwirenut; 04/23/11 11:36 PM.
Re: 5 ohm speed pot wiring [Re: lite bulb] #200994
05/02/11 03:39 AM
05/02/11 03:39 AM
Scott35  Offline
Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,720
Anaheim, CA. USA
Agree with NJwirenut per the Colors -vs- Position on the Pot (Potentiometer).

With the Device's Shaft facing towards you:

  1. "RED" - to "Left-Side" of the Resistor (Terminal #1), for the Input Lead (DCV+ / Vss),
  2. "WHITE" - to the "Center / Wiper Lead" (Terminal #2), for the Loop-Back Lead,
  3. "BLACK" - to the "Right-Side" of the Resistor (Terminal #3), for the Ground Lead (DCV- / Vcc).


Terminate the Drains & Shields of all Cables at one common point. Isolate the Drain and Shield at the Pot, with Electrical Tape.

-- Scott


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Admin
Admin
NY, USA
Posts: 3,545
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
255,023 Are you busy
191,157 Re: Forum
180,909 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.030s Queries: 15 (0.013s) Memory: 0.9521 MB (Peak: 1.0786 MB) Zlib enabled. Server Time: 2019-05-20 11:07:32 UTC