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Old 01-28-2020, 10:26 PM   #1
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 100
Year: 1995
Coachwork: Thomas
Chassis: Saf-T-Liner ER
Engine: Cummins ISC 8.3 Allison MD3060
Help with an outside electrical plug

Can someone tell me what this is for?
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Old 01-28-2020, 10:37 PM   #2
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Year: 2003
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Chassis: CE 300
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It's the connection for your block heater. It keeps your engine warm so it's easier to start in cold weather.
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Old 01-28-2020, 10:59 PM   #3
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Join Date: May 2016
Location: Georgia
Posts: 1,962
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
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As noted, block heater plug. I'd plug it in for temps under ~32, but only if you plan to start the engine the next day, no need to waste power if you're not going to need to start the engine. Typically takes about 3-4 hours from stone cold to pre-heated engine.
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