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billhuntersemail(at)gmail
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 Posted: Fri Sep 11, 2020 12:13 pm Post subject: Nav Light CB Rating |
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What is the suggested CB rating of a navigation light circuit on a 14 VDC
system?
The airplane is fiberglass so the Nav light circuit is 53 feet from the CB
to the switch to the Nav light fixture and back to the forest of grounds and
it is wired with 18 AWG wire? My current system has a 5 AMP CB that
services only the two navigation light bulb fixtures that each has two bulbs
(total of 4 incandescent light bulbs).
I do not know the manufacturer of the light fixture so I do not have any
idea what these light bulbs draw. It was suggested that I install a 5 AMP
CB and when I turn on the switch the lights all illuminate and they stay on
for about 20 minutes and then the CB pops. On hotter days the time before
the CB pops is more like 10 minutes so it seems that the thermal load on the
current 5 AMP CB is too great. Of course I can upgrade the CB but I would
prefer to know if a 7 AMP or 10 amp is preferred so that is why I am
reaching out to the experts on the subject.
As always THANKS for your help!!!.
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jluckey(at)pacbell.net
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| Posted: Fri Sep 11, 2020 1:31 pm Post subject: Nav Light CB Rating |
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Bill,
If you get the numbers from those bulbs you can look them up and find their current rating. That way you know for sure what you've got.
But #18 wire is fine at 10 amps, so just upgrade to a 10 amp breaker and call it good.
Remember, the CB is there to protect the wire not the load.
-Jeff
On Friday, September 11, 2020, 01:25:16 PM PDT, billhuntersemail(at)gmail.com <billhuntersemail(at)gmail.com> wrote:
--> AeroElectric-List message posted by: <billhuntersemail(at)gmail.com (billhuntersemail(at)gmail.com)>
What is the suggested CB rating of a navigation light circuit on a 14 VDC
system?
The airplane is fiberglass so the Nav light circuit is 53 feet from the CB
to the switch to the Nav light fixture and back to the forest of grounds and
it is wired with 18 AWG wire? My current system has a 5 AMP CB that
services only the two navigation light bulb fixtures that each has two bulbs
(total of 4 incandescent light bulbs).
I do not know the manufacturer of the light fixture so I do not have any
idea what these light bulbs draw. It was suggested that I install a 5 AMP
CB and when I turn on the switch the lights all illuminate and they stay on
for about 20 minutes and then the CB pops. On hotter days the time before
the CB pops is more like 10 minutes so it seems that the thermal load on the
current 5 AMP CB is too great. Of course I can upgrade the CB but I would
prefer to know if a 7 AMP or 10 amp is preferred so that is why I am
reaching out to the experts on the subject.
As always THANKS for your help!!!.
_/Navigator?AeroElectric-List" target="_blank">http://www.matronics.com/Na= - MATRONICS WEB FORUMS= --> /wiki.matronics.com" target="_blank">http://wiki.matronics.com
http://www.mat====
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billhuntersemail(at)gmail
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| Posted: Fri Sep 11, 2020 1:46 pm Post subject: Nav Light CB Rating |
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Thanks Jeff…greatly appreciate the help!!!
From: owner-aeroelectric-list-server(at)matronics.com <owner-aeroelectric-list-server(at)matronics.com> On Behalf Of Jeff Luckey
Sent: Friday, September 11, 2020 2:25 PM
To: aeroelectric-list(at)matronics.com
Subject: Re: Nav Light CB Rating
Bill,
If you get the numbers from those bulbs you can look them up and find their current rating. That way you know for sure what you've got.
But #18 wire is fine at 10 amps, so just upgrade to a 10 amp breaker and call it good.
Remember, the CB is there to protect the wire not the load.
-Jeff
On Friday, September 11, 2020, 01:25:16 PM PDT, billhuntersemail(at)gmail.com (billhuntersemail(at)gmail.com) <billhuntersemail(at)gmail.com (billhuntersemail(at)gmail.com)> wrote:
--> AeroElectric-List message posted by: <billhuntersemail(at)gmail.com (billhuntersemail(at)gmail.com)>
What is the suggested CB rating of a navigation light circuit on a 14 VDC
system?
The airplane is fiberglass so the Nav light circuit is 53 feet from the CB
to the switch to the Nav light fixture and back to the forest of grounds and
it is wired with 18 AWG wire? My current system has a 5 AMP CB that
services only the two navigation light bulb fixtures that each has two bulbs
(total of 4 incandescent light bulbs).
I do not know the manufacturer of the light fixture so I do not have any
idea what these light bulbs draw. It was suggested that I install a 5 AMP
CB and when I turn on the switch the lights all illuminate and they stay on
for about 20 minutes and then the CB pops. On hotter days the time before
the CB pops is more like 10 minutes so it seems that the thermal load on the
current 5 AMP CB is too great. Of course I can upgrade the CB but I would
prefer to know if a 7 AMP or 10 amp is preferred so that is why I am
reaching out to the experts on the subject.
As always THANKS for your help!!!.
_/Navigator?AeroElectric-List" target="_blank">http://www.matronics.com/Na= - MATRONICS WEB FORUMS= -->
/wiki.matronics.com" target="_blank">http://wiki.matronics.com
http://www.mat====
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mikepienaar09(at)gmail.co
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| Posted: Fri Sep 11, 2020 1:55 pm Post subject: Nav Light CB Rating |
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I have Whelen position lights and current draw is 7.5 amp
Sent from my iPhone
| Quote: | On Sep 11, 2020, at 2:38 PM, Jeff Luckey <jluckey(at)pacbell.net> wrote:
Bill,
If you get the numbers from those bulbs you can look them up and find their current rating. That way you know for sure what you've got.
But #18 wire is fine at 10 amps, so just upgrade to a 10 amp breaker and call it good.
Remember, the CB is there to protect the wire not the load.
-Jeff
On Friday, September 11, 2020, 01:25:16 PM PDT, billhuntersemail(at)gmail.com <billhuntersemail(at)gmail.com> wrote:
--> AeroElectric-List message posted by: <billhuntersemail(at)gmail.com (billhuntersemail(at)gmail.com)>
What is the suggested CB rating of a navigation light circuit on a 14 VDC
system?
The airplane is fiberglass so the Nav light circuit is 53 feet from the CB
to the switch to the Nav light fixture and back to the forest of grounds and
it is wired with 18 AWG wire? My current system has a 5 AMP CB that
services only the two navigation light bulb fixtures that each has two bulbs
(total of 4 incandescent light bulbs).
I do not know the manufacturer of the light fixture so I do not have any
idea what these light bulbs draw. It was suggested that I install a 5 AMP
CB and when I turn on the switch the lights all illuminate and they stay on
for about 20 minutes and then the CB pops. On hotter days the time before
the CB pops is more like 10 minutes so it seems that the thermal load on the
current 5 AMP CB is too great. Of course I can upgrade the CB but I would
prefer to know if a 7 AMP or 10 amp is preferred so that is why I am
reaching out to the experts on the subject.
As always THANKS for your help!!!.
_/Navigator?AeroElectric-List" target="_blank">http://www.matronics.com/Na= - MATRONICS WEB FORUMS= --> [/url]
[url=http://forums.matronics.com]/wiki.matronics.com" target="_blank">http://wiki.matronics.com
http://www.mat====
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