ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Recent Posts
Chinese motors rated 220 v 50 hertz
by gfretwell - 07/23/24 04:45 PM
100 Definitions: Accessible 2023
by gfretwell - 07/23/24 10:12 AM
100 Definitions, Likely to Become Energized, 2023
by gfretwell - 07/23/24 10:08 AM
240V only in a home and NEC?
by emolatur - 07/18/24 01:05 PM
2023 CEU Course
by gfretwell - 07/17/24 01:08 AM
Advertisement:
Recent Gallery Topics:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
2 members (Admin, gfretwell), 767 guests, and 40 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#200874 04/23/11 10:42 PM
Joined: Feb 2006
Posts: 78
L
Member
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.

Horizontal Ad
Joined: Sep 2001
Posts: 806
N
Member
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.
Joined: Oct 2000
Posts: 2,723
Likes: 1
Broom Pusher and
Member
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!

Link Copied to Clipboard
Featured:

* * * * * * *
Tools for Electricians
Tools for Electricians
 
* * * * * * *

2023 National Electrical Code (NEC)
2023 NEC + Exam Prep Study Guides Now Available!

Member Spotlight
noderaser
noderaser
Portland, Oregon, United States
Posts: 404
Joined: March 2007
Top Posters(30 Days)
Popular Topics(Views)
323,533 Are you busy
247,855 Re: Forum
231,637 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5