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https://cdn.shutterstock.com/shutterstock/videos/9644456/thumb/5.jpg?i10c=img.resize(height:72)

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http://images.zarebasystems.com/is/image/woodstream/ec_us_GR8-2?$ProductPgLarge2$

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Image result for Ground Fault Interrupter

OPEN
GROUND
OPEN
NEUTRAL
OPEN HOT
HOT/GRD.
REVERSE
HOT,'NEU.
REVERSE
CORRECT
ooo
000
ooo
ooo
coo
000

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Lightning Stroke Density 30+ 20 16 14 12 8 6 4 2 1 0.5 0.1

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DC POWER SUPPLY 5-15V 30A
mod PC 30 D
METER
CONTINUOUS SHORT CIRCUIT PROTECTION
15A
AMAX
OVER VOLTAGE PROTECTION
OVER TEMPERATURE CONTROL
FUSE

http://c.shld.net/rpx/i/s/i/spin/image/spin_prod_634038101

Radio-MB-Module-Req-6