1986 63 MY. All 8 of the panel illumination bullbs on my AC panel are burned out (that way when bought).
Bulb is CM1828. Stamped on casing is 37.5v, 50 milli-amps. Multimeter reading at each bulb socket is
74v. I find it unusual for all 8 bulbs to be burned out. Wondering if the culprit is the 74v.
Anyone have any idea of what the voltage should be (assume 37.5) and how it gets stepped down to
to that voltage in a 120/240 panel?
John McCarley
Water Colors
Wrightsville Beach NC
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11-29-2019 04:43 PM #1Senior Member
- Join Date
- Apr 2005
- Posts
- 224
AC Panel Illumination Bulbs CM1828
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11-29-2019 05:47 PM #2Senior Member
- Join Date
- Jun 2018
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- 1,069
Re: AC Panel Illumination Bulbs CM1828
Per chance the PO put the wrong bulbs in the AC panel? Those are used in many places, such as holding tank 3/4 full indicators, but off the battery (32V), not AC. Maybe the PO thought they went there as well?
Prometheus
1978 53' MY Hull #529
Viera, FL
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11-29-2019 06:12 PM #3Senior Member
- Join Date
- Apr 2008
- Posts
- 2,003
Re: AC Panel Illumination Bulbs CM1828
I replaced mine. Sam's had them.
GLORY Hull # 365
Northport, NY
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Re: AC Panel Illumination Bulbs CM1828
Call Sams on Monday. Ask Steve which bulbs you need just in case the PO put the wrong ones in there.
SEVEN
1979 53' MY Hull #563
Antioch, California
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Re: AC Panel Illumination Bulbs CM1828
I second (third or whatever) that. Call Sams.
Sky Cheney
1985 53EDMY, Hull #CN759, "Rebecca"
ELYC on White Lake--Montague, MI
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Re: AC Panel Illumination Bulbs CM1828
Nobody questioned the 74v reading?
"DON'T BELIEVE ANYTHING YOU READ OR HEAR AND ONLY HALF OF WHAT YOU SEE" - BEN FRANKLIN
Endless Summer
1967 50c 12/71n DDA 525hp
ex Miss Betsy
owners:
Howard P. Miller 1967-1974
Richard F Hull 1974-1976
Robert J. & R.Scott Smith 1976-present
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11-30-2019 10:00 AM #7Senior Member
- Join Date
- Jun 2018
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- 1,069
Re: AC Panel Illumination Bulbs CM1828
RMS. Was using DC meter.
Prometheus
1978 53' MY Hull #529
Viera, FL
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11-30-2019 01:46 PM #8Senior Member
- Join Date
- Apr 2005
- Posts
- 224
Re: AC Panel Illumination Bulbs CM1828
My bad. 34.9 when measuring VDC.
John
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12-03-2019 09:37 AM #9Senior Member
- Join Date
- Jun 2012
- Posts
- 512
Re: AC Panel Illumination Bulbs CM1828
1828 bulbs are incorrect for this installation. My bulbs are marked B2A.
Also the bulbs for indicating which shore power is plugged in and available are protected by large “buss” type fuses.JMooney
61 MY 1983 #341
“Jerrie”
Miami , FL