BBHD12-277 Heater
14
11) FAQ
F
requently
A
sked
Q
uestions
About BBHD12-277 Heaters
Why are there two 120V and 277V inputs?
The 120V and 277V inputs can supply only a limited power based on the size of the
circuit. The 4 inputs split the total amperage draw of 60A into two 14A input and two 16A
inputs, allowing the first two connections to draw power from a 120V power supply on a
15A circuit without tripping a breaker or blowing a fuse and the other two connections to
draw power from a 277V source on a 17A circuit without tripping a breaker or blowing a
fuse.
Which of the 120V extension cords must be plugged in for use?
The master / control power 120V extension cord must be plugged in or the unit will not
operate. This input is the one labeled Master.
Do I need all 120V and 277V extension cords plugged in?
No, the units will run with fewer than four cords plugged in but at a reduced heat output.
We recommend using all four plugs as that will allow the unit to produce the most heat
which provides the quickest heating time, the ability to treat a larger space than with
fewer than all four plugs, and to ensure that the desired temperature is reached.
Can I use the 120 volt extension cords and the 277 volt extension cords at the
same time?
The BBHD12 is designed to use both 120 volts and 277 volts at the same time.
What size power cord should I use?
It depends on how long the extension cord is. For 120 volts the wire must be at least #14
wire for up to 50 feet and #12 wire for anything above 50ft. For 277 volts, minimum wire
size is a #6 for up to 100 feet.
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