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03-20-2019, 10:59 PM
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#1
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Junior Member
Join Date: Mar 2019
Posts: 1
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Replacing a microwave/convection oven
We have to replace a broken microwave/convection oven in our 1998 National Tropical. The current convection oven is 825 watts. Do i need to worry about damaging the electrical system if i replace the broken oven with a 1000 watt oven? Our RV is a 30 amp. The oven is on a 20 amp circuit. Thanks for the help.
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03-20-2019, 11:14 PM
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#2
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Senior Member
Join Date: Feb 2017
Posts: 1,037
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20A is 20x120=2400W
So breaker and wiring is OK.
825 and 1000 are pretty close. With 30A you're still looking at the "2 big ones" rule. (2 out of AC/MICRO/Water Heater if electric/Any kind of electric heat.
__________________
'20 RAM 3500, '20 Heartland Road Warrior 430 https://thecastle.blog/ Also: Eagle Cap 950 Before:'17 Berkshire 38A class A https://dragonship.blog/ '11 Heartland Cyclone TH, '11 Lance TC, '05 Keystone TT, '76 Coachmen class A and a '16 DIY Transit conversion........
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03-21-2019, 09:03 AM
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#3
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Registered User
Ford Super Duty Owner
Join Date: Nov 2014
Location: NW Ohio
Posts: 7,114
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Welcome to the forum.
You should be OK.. Are you installing a convection/Microwave? If so, be sure to install any ducting to ventilate the oven.
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03-21-2019, 09:05 AM
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#4
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Senior Member
Join Date: Feb 2017
Posts: 1,037
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Quote:
Originally Posted by Waiter21
Welcome to the forum.
You should be OK.. Are you installing a convection/Microwave? If so, be sure to install any ducting to ventilate the oven.
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I have a convection/microwave factory installed. There is no ducting. It works fine.
__________________
'20 RAM 3500, '20 Heartland Road Warrior 430 https://thecastle.blog/ Also: Eagle Cap 950 Before:'17 Berkshire 38A class A https://dragonship.blog/ '11 Heartland Cyclone TH, '11 Lance TC, '05 Keystone TT, '76 Coachmen class A and a '16 DIY Transit conversion........
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03-21-2019, 09:27 AM
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#5
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Senior Member
American Coach Owners Club
Join Date: Jul 2007
Location: SW Florida
Posts: 2,971
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Quote:
Originally Posted by srvt
We have to replace a broken microwave/convection oven in our 1998 National Tropical. The current convection oven is 825 watts. Do i need to worry about damaging the electrical system if i replace the broken oven with a 1000 watt oven? Our RV is a 30 amp. The oven is on a 20 amp circuit. Thanks for the help.
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No problem at all.
With both ac's running on shore power, along with other things, your EMS probably sheds part of the load temporarily, anyway.
With ours, I set it up, so that it would only shed the ac's and nothing else, which is usually sufficient for any scenario.
__________________
07 Revolution LE 40E_1 1/2 Baths_Spartan MM Chassis_06 400HP C9 CAT_ Allison 3000
Dinghy_2010 Jeep Wrangler JKU ISLANDER
1998 36ft. National Tropi-Cal Chevy Model 6350 (SOLD)
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03-21-2019, 11:44 AM
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#6
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Senior Member
Join Date: Sep 2018
Location: Fort Myers, FL
Posts: 1,694
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Many report their microwaves "broken" and then simply replace the internal fuse that sometimes blows... varies by model, of course. Bless Google.
Just sayin'
__________________
2008 Phaeton 36QSH, Safe-t-Plus, Quadra Bigfoot
2017 Jeep Cherokee Trailhawk w/ flat tow wiring mod.
Blue ox, BrakeMaster + BrakeAway, diode lights and charge.
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03-21-2019, 12:57 PM
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#7
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Registered User
Join Date: Mar 2015
Location: LA, Lower Alabama
Posts: 2,430
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I recently had to fix ours. It would cut out and wiggling the plug, hard to access as it was up and behind the unit, would bring it back. But performance was bad, slow cooking etc. I determined it was the power cord or wall receptacle. Turned out what I thought was corrosion was melted. Either a loose ground or hot wire fused the plug and receptacle. Replaced both and all fixed. Start with the simple and work up on fixing.
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03-21-2019, 01:36 PM
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#8
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Senior Member
Join Date: Jan 2018
Location: Aurora MO
Posts: 101
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I had to replace the microwave in our 1996 Southwind last year. It was an 800 watt unit also, I replaced it with a Dometic DCMG11B.F 1000 watt convection microwave oven that I found at Camping World. It was the only one I could find that was close to the size that would fit my cabinets. I still had to make some modifications to the cabinet, mounting hardware and venting to make it fit. I also have a 30 amp service and have hand no problems.
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03-21-2019, 09:21 PM
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#9
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Senior Member
Join Date: Sep 2013
Location: Pacific Northwest and Arizona
Posts: 2,050
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I did it, works fine. 20 amp circuit will handle it fine. Household kitchen microwave circuits are 20 amps.
While your original microwave was 850 watts you have to remember the electric element draws quite a bit too and if you are browning and microwaving at the same time it's pulling more than the 850 watts - probably more than 1000 watts total.
__________________
Tom and Pris M. along with Buddy the 18 year old Siamese cat
1998 Safari Serengeti 3706, 300HP Cat 3126 Allison 3060, 900 watts of Solar.
Dragging four telescopes around the US in search of dark skies.
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03-22-2019, 09:08 AM
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#10
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Senior Member
American Coach Owners Club
Join Date: Jul 2007
Location: SW Florida
Posts: 2,971
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Quote:
Originally Posted by Domo
Many report their microwaves "broken" and then simply replace the internal fuse that sometimes blows... varies by model, of course. Bless Google.
Just sayin'
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Ours made a terrible noise, before blowing the internal fuse.
The good news was, that I was able to change it, by removing the tops grille.
The bad news was, that it blew again and turned out to be a faulty capacitor, that caused it.
It's now installed in our home, since a new new one was installed in the coach, while on the road, with the original traveling back home in the toad.
__________________
07 Revolution LE 40E_1 1/2 Baths_Spartan MM Chassis_06 400HP C9 CAT_ Allison 3000
Dinghy_2010 Jeep Wrangler JKU ISLANDER
1998 36ft. National Tropi-Cal Chevy Model 6350 (SOLD)
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03-27-2019, 04:21 PM
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#11
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Member
Holiday Rambler Owners Club
Join Date: Mar 2016
Posts: 76
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A Convection / Microwave oven with a cooking power of 1000 watts has an input wattage of 1700 watts which equates to 15 amps so your 20 amp circuit should be OK.
__________________
Alounsbe, Port Saint Lucie FL
2005 Holiday Rambler Ambassador 38 PDQ
2017 Jeep JKU, & 2014 Victory Cross Country Toads
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03-28-2019, 01:40 PM
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#12
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Senior Member
Join Date: Sep 2018
Location: Fort Myers, FL
Posts: 1,694
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Quote:
Originally Posted by tropical36
Ours made a terrible noise, before blowing the internal fuse.
The good news was, that I was able to change it, by removing the tops grille.
The bad news was, that it blew again and turned out to be a faulty capacitor, that caused it.
It's now installed in our home, since a new new one was installed in the coach, while on the road, with the original traveling back home in the toad.
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Good job!
__________________
2008 Phaeton 36QSH, Safe-t-Plus, Quadra Bigfoot
2017 Jeep Cherokee Trailhawk w/ flat tow wiring mod.
Blue ox, BrakeMaster + BrakeAway, diode lights and charge.
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