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William K.
User Rank
Platinum
Re: Designed, possibly, but engineered? no way.
William K.   1/9/2014 3:29:01 PM
NO RATINGS
@Larry, OK, some folks do use the trailers for more than recreatioal activities. I had not considered that possibility, and it seems that most long-term-in-one-place trailers are made differently than the recreational type. BUT that would certainly explain the wear out condition.

And I did do some more research, and it happens that some slide switches are made for a lot more current, up to 3.5 amps, if you believe the manufacturers rating. So some switches may not be over rated, you would need to read the printing on the switch. Of course a slow-make slow-break switch is always a bad choice for switching any level of power, even if the switch is rated for the load. But they are still cheaper than any other kind, and in some organizations low price is the number 1 purchasing qualifier.

Larry M
User Rank
Platinum
Re: Designed, possibly, but engineered? no way.
Larry M   1/8/2014 11:30:42 PM
NO RATINGS
William K. wrote: "The choice was aided by the fact that a lot of folks don't use the trailer that much,"

In this case, the GF lived full-time in the 22-foot trailer for four years.

Larry M
User Rank
Platinum
Re: Scorched lens
Larry M   1/8/2014 11:28:57 PM
NO RATINGS
Stephen wrote: "Not that monkeys replacing 18W lamps w/ 27W lamps contributes in the slightest...!"

Well, yes. Not even sure if my GF knew what she was doing. I expect she simply went to the local auto parts store and bought lamps that had the same physical dimensions.

There's something to be said for the old-fashioned "Fusestat," screw-in plug fuses for residential circuits. They had the unique property that a unique socket was used for each amperage rating. E.g., you could not screw a 20, 25, or 30 amp fusestat into a socket meant for 15 amperes. The installing electrician selected sockets for each panel position to match the wire size of that circuit. This never seems to have been done for lamp sockets or other fuse styles.

Larry

Larry M
User Rank
Platinum
Re: Switches and LED's
Larry M   1/8/2014 11:16:30 PM
NO RATINGS
Al Schott wrote: "The only problem I have with the LED replacements is the color - bluish white, where the original bulbs are warm white."

Actually, I was able to find bright LEDs on Amazon in warm white at the same price as cool white. If you haven't looked in a few years, have another look.

Larry

J. Williams
User Rank
Platinum
Re: Switches and LED's
J. Williams   1/8/2014 5:53:21 PM
NO RATINGS
Same here.  I have a 2003 Jayco Qwest TT with the push-button fixtures that take the wedge base lamps.  Have to be careful selecting the right lamps because it is easy to melt right through the lens.  I always forget whether they are 914's or 921's.  To make matters worse, some packages are labeled in watts rather than the bulb type.  My 2013 Jayco Seneca uses the recessed hockey puck lamps with the G4 halogens.  I've been replacing those 10W and 20W lamps with some LED disks with about 10 LED's on them.  They are getting better with the color rendition.  Still a little bluish but much, much better than earlier versions.   These LED modules were made with the 5050 SMD LED's. 

http://www.amazon.com/gp/product/B009DRKQ1Y/ref=oh_details_o03_s01_i01?ie=UTF8&psc=1 

I also recently purchased some wedgebase LED modules but haven't tried them out yet in my TT.

http://www.amazon.com/gp/product/B008P44IF6/ref=oh_details_o00_s02_i00?ie=UTF8&psc=1 

I fired these up on the bench and they look pretty good.  I will do a side-by-side in my TT at some point soon.  I'm not sure what LED is used in the wedgebase modules but the color appears to be identical to the 5050's.

Stephen
User Rank
Gold
Scorched lens
Stephen   1/8/2014 3:27:43 PM
"The second design flaw in this lamp is the plastic diffuser lens. They scorch and melt from the heat of the lamp"

 

Not that monkeys replacing 18W lamps w/ 27W lamps contributes in the slightest...!

alschott
User Rank
Iron
Switches and LED's
alschott   1/6/2014 11:40:39 AM
NO RATINGS
My fixtures in the camper are just a little better, push button actuating a stamped contact. 

The bulbs do heat the fixtures - haven't had the scorching yet, but they get hot to handle.

The LED replacements generate a little heat, not hot enough to burn my hands, but still warm.  Probably due to the current limiting resistors used on the mounting boards. 

The only problem I have with the LED replacements is the color - bluish white, where the original bulbs are warm white. 

William K.
User Rank
Platinum
Designed, possibly, but engineered? no way.
William K.   1/3/2014 4:21:31 PM
In some brands of travel trailer you do find interesting designs that provide some neat little feature, but that fail frequently. The use of slide switches is a good example. Of course if you examine the price it becomes very clear why the slider was selected, which is because a slide switch is much less expensive than a good switch. The choice was aided by the fact that a lot of folks don't use the trailer that much, and so the switch may only need to last for a few hundred operations. And the inrush in the travel trailer application is not so great because of the current limiting nature of the thin wire used. So aside from the frame and suspension, which may be engineered, or just drafted by somebody who looked up some specifications, not a whole lot is really engineered. They are designed by people with experience in the field, but the most math involved is in checking fits and costs, not evaluating stresses and strengths. There are a couple of exceptions, and I am sure that they will choose to comment. But just because it can be drawn does not mean that a product will last.

naperlou
User Rank
Blogger
Intentional mismatch?
naperlou   1/2/2014 2:54:40 PM
NO RATINGS
Larry, you have to wonder why the mismatch between the switch and the application.  Perhaps soon we will see LEDs replacing all lights in automotive applications. 

tekochip
User Rank
Platinum
Great Replacement
tekochip   1/2/2014 8:23:59 AM
LED lamps a great replacement in automotive applications.  The current draw is about 1/10th of incandescent, the service life is longer and they perform better under vibration.  I've replaced a few in incandescent in my 172 and really wish the FAA would approve more applications.


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