glock19
On a very unimportant topic, is there any chemical that can be placed in a generator or transfer switch that will keep wasps out?  Where I live, wasps will build nests anywhere they can, and mud daubers will find the smallest of holes to enter and make a mess.

I used to successfully use moth balls that contained Naphthalene in some applications.  I have no idea if this chemical would be an issue inside the generator case.  Any suggestions?
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78buckshot
In an enclosure I think plastic and rubber will suffer from the moth balls. You could try clothes dryer sheets, we have some success with them for rodent deterrent in air conditioning condensing units.
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Pville
What I did was to put household window bug screening over the vented ends of the housing and the rear intake for the alternator.  I used the metal style screen material.  Then using regular silicone seal I glued a strip of flexible magnet around the perimeter of the screen.  Once the silicone cured it was ready for install.  Did that about 5 years ago and have not had any  issues with insects inside the cabinet.  Of course the magnet will only work on the steel cabinet models, but I'd bet a Velcro type fastener could also be made.
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SouthLake
during bug season when i do my seasonal spraying, i shoot the generator and have not had any insect problems. I use Talstar P when i treat the foundation of the house, that's what i shoot on the enclosure.
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Cobranut
Pville wrote:
What I did was to put household window bug screening over the vented ends of the housing and the rear intake for the alternator.  I used the metal style screen material.  Then using regular silicone seal I glued a strip of flexible magnet around the perimeter of the screen.  Once the silicone cured it was ready for install.  Did that about 5 years ago and have not had any  issues with insects inside the cabinet.  Of course the magnet will only work on the steel cabinet models, but I'd bet a Velcro type fastener could also be made.


I'd be a little concerned about the screen restricting airflow, particularly if you're in a hot climate.
Most gensets move a lot of air through the cabinet for cooling, so a close woven screen could be restrictive.
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UPS
Cobranut wrote:


I'd be a little concerned about the screen restricting airflow, particularly if you're in a hot climate.
Most gensets move a lot of air through the cabinet for cooling, so a close woven screen could be restrictive.


Even more so if dirt and dust should gradually build up on the screen.
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Pville
Cobranut wrote:


I'd be a little concerned about the screen restricting airflow, particularly if you're in a hot climate.
Most gensets move a lot of air through the cabinet for cooling, so a close woven screen could be restrictive.


I placed the screens on the genset about 5 years ago.  Summer temps can get over 100F but usually in the 90s at my location.  To date no issues. 
A year or so ago the unit ran for about 2 days during a summer outage with high 90F temps.  I don't believe the screens have had an adverse effect,
but your point on airflow is well taken. 

As for UPS's note of dirt build up on screening since they are attached with magnets they are easily removed and hosed off.  I do this to mine end of Spring and
Summer.  A couple of minutes to hose off twice a year is an easy thing to do and better than finding out the inside of the cabinet has a wasp, hornet, or mud bee
colony, all of which are numerous at my area.
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Cobranut
I'll admit the magnetic attachment is a great idea.  Keeping the screens clean will minimize any restriction. 
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Dick from Canada
I have had insects get into the gas regulator vent that is vented outside of the cabinet with a rubber hose. Removed and cleaned out with a small venturi brush. Now spray insect spray around the vent and around the concrete pad the generator sits on . Do this about 3 times a year. Seems to keep them at bay.  As noted by other any screens should be kept clean .
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