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#71355 - 10/26/06 07:53 PM 3-way Pilot Light switch with pathetic lifespan
Haligan Offline
Member

Registered: 02/25/04
Posts: 112
Loc: 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?

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#71356 - 10/27/06 02:52 AM Re: 3-way Pilot Light switch with pathetic lifespan
PE&Master Offline
Member

Registered: 02/25/06
Posts: 138
Loc: 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.

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#71357 - 10/27/06 07:03 AM Re: 3-way Pilot Light switch with pathetic lifespan
earlydean Offline
Member

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

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#71358 - 10/27/06 02:35 PM Re: 3-way Pilot Light switch with pathetic lifespan
Rewired Offline
Member

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

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#71359 - 10/27/06 08:28 PM Re: 3-way Pilot Light switch with pathetic lifespan
Beachboy Offline
Member

Registered: 09/02/06
Posts: 26
Loc: 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.

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#71360 - 10/27/06 10:39 PM Re: 3-way Pilot Light switch with pathetic lifespan
Haligan Offline
Member

Registered: 02/25/04
Posts: 112
Loc: 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.

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#71361 - 10/27/06 11:49 PM Re: 3-way Pilot Light switch with pathetic lifespan
BOBELECTRIC Offline
Junior Member

Registered: 07/22/06
Posts: 7
Loc: 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

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#71362 - 10/28/06 03:20 AM Re: 3-way Pilot Light switch with pathetic lifespan
RODALCO Offline
Member

Registered: 12/08/05
Posts: 863
Loc: 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.

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#71363 - 10/28/06 03:34 AM Re: 3-way Pilot Light switch with pathetic lifespan
RODALCO Offline
Member

Registered: 12/08/05
Posts: 863
Loc: Titirangi, Akld, New Zealand






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.

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#71364 - 10/28/06 04:56 AM Re: 3-way Pilot Light switch with pathetic lifespan
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: 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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