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3-way Pilot Light switch with pathetic lifespan #71355
10/26/06 09:53 PM
10/26/06 09:53 PM
H
Haligan  Offline OP
Member
Joined: Feb 2004
Posts: 111
Berkeley, CA USA
I'm on my 3rd Hubbell 1203PL 3way pilot light toggle.

(light on - load on)

Honest to God the pilot light only seems to last 8 months. That's terrible. I'm going back to put in a Leviton switch this time and see what happens. I put the meter on there and checked everything in there and it's wired correctly. Nothing funky going on.

Anyone have a successful history with these?

Work Gear for Electricians and the Trades
Re: 3-way Pilot Light switch with pathetic lifespan #71356
10/27/06 04:52 AM
10/27/06 04:52 AM
P
PE&Master  Offline
Member
Joined: Feb 2006
Posts: 138
TX, USA
Are you using it for the right load?

Motor loads are hard on switches and they need to be rated for the inrush.

Re: 3-way Pilot Light switch with pathetic lifespan #71357
10/27/06 09:03 AM
10/27/06 09:03 AM
E
earlydean  Offline
Member
Joined: Dec 2003
Posts: 751
Griswold, CT, USA
I see from the product datasheet: http://www.hubbellcatalog.com/wiring/section-c-datasheet.asp?FAM=Switches&PN=HBL1203PL
this switch is rated for a 1/2 HP motor at 120 volts.

I see on the schematic, a supplemental ground connection on the pilot.


Earl
Re: 3-way Pilot Light switch with pathetic lifespan #71358
10/27/06 04:35 PM
10/27/06 04:35 PM
R
Rewired  Offline
Member
Joined: Jan 2006
Posts: 558
Hamilton, Ontario, Canada
I have a couple of those ( of the single pole leviton variety) on a furnace and power vent water heater circuit and have noticed the indicators have become really dim, but still visible. Mind you they have been on almost 24/7 for the past 8-10 years.
Perhaps the hubbell have had a defective run of switches or the little neon indicators?

A.D

Re: 3-way Pilot Light switch with pathetic lifespan #71359
10/27/06 10:28 PM
10/27/06 10:28 PM
B
Beachboy  Offline
Member
Joined: Sep 2006
Posts: 26
Wamego, Kansas USA
From the schematics, the indicator bulbs appear to be neon bulbs. I was under the impression that the common neon bulb was good for 20,000 hours of life.

Re: 3-way Pilot Light switch with pathetic lifespan #71360
10/28/06 12:39 AM
10/28/06 12:39 AM
H
Haligan  Offline OP
Member
Joined: Feb 2004
Posts: 111
Berkeley, CA USA
Geez this is connected to a light. A plain old incandescent lightbulb. This switch is a real disappointment.

I might change it to a standard 3way and add a 120v LED with a flange right over the switch. LEDs have a crazy long lifespan.

Re: 3-way Pilot Light switch with pathetic lifespan #71361
10/28/06 01:49 AM
10/28/06 01:49 AM
B
BOBELECTRIC  Offline
Junior Member
Joined: Jul 2006
Posts: 7
Eighty Four,Pa.U.S.A.
Glad you posted.At $65 each,I was looking bad.I have same problem,short lifespan.Next is led pilot light

Bob O.84,Pa.15330


Bob O.84,Pa.15330
Re: 3-way Pilot Light switch with pathetic lifespan #71362
10/28/06 05:20 AM
10/28/06 05:20 AM
R
RODALCO  Offline
Member
Joined: Dec 2005
Posts: 856
Titirangi, Akld, New Zealand
Use a LED, run it at 3 mA and problem is sorted for life.
I use a 66 k.Ohms 2 watt resistor for 230 Volts ( 2 x 33 K ohms 1 watt in series )
Then a 1 N914 diode antiparrallel with the LED.
For anyone knowing basic soldering and tidy working it is a easy to fit in any switch with perfect results. also no heating in the resistors.

For 110 Volts design the circuit to run at about 3 mA which is ample for a high efficiency led. a single 33 or 39 k Ohm 2 watt resistor will suffice.

I have found neons with the incorrect series resistors which means excessive current and a short lifespan.


The product of rotation, excitation and flux produces electricty.
Re: 3-way Pilot Light switch with pathetic lifespan #71363
10/28/06 05:34 AM
10/28/06 05:34 AM
R
RODALCO  Offline
Member
Joined: Dec 2005
Posts: 856
Titirangi, Akld, New Zealand
[Linked Image]

[Linked Image]

[Linked Image]

Above are the schematics how to build the circuit and one application where we use them in the substations for the streetlight and hotwater pilots.

Where:
D1 is 1N4007 diode
D2 is 1N914 or equivalent
D3 is LED,3000, or 5000 Milicandela
R 1 and R 2 series voltage dropping resistors.


Hope they post OK.

Good luck with it

{ Images moved to ECN server }


[This message has been edited by pauluk (edited 10-28-2006).]


The product of rotation, excitation and flux produces electricty.
Re: 3-way Pilot Light switch with pathetic lifespan #71364
10/28/06 06:56 AM
10/28/06 06:56 AM
P
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Isn't series diode D1 somewhat superfluous, unless the LED being used has an exceptionally low reverse-voltage rating?

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