Samsung AM MXVAFC Series Installation Manual page 70

Electrical wiring work
Grounding work
Grounding must be done by a qualified installer for your safety .
Grounding the power cable
f The standard of grounding may vary according to the rated voltage and installation place of the air conditioner . f
f Ground the power cable according to the following table . f
Power condition
Installation place
High humidity
Average humidity
Low humidity
Note 1) About grounding work 3.
• Grounding work must be done by an expert (with qualification) .
• Check if the grounding resistance is lower than 100Ω . When installing a earth leakage breaker (that can cut the electric
circuit within 0 . 5 second in case of a short circuit), allowable grounding resistance should be 30~500Ω .
Note 2) Grounding at dry place
• The grounding resistance should be lower than 100Ω . Even in worst case, grounding resistance should be lower than
250Ω .
Performing the grounding work
f Use a rated grounding cable by referring to the specification of the electric cable for the outdoor unit . f
❋ ❋ When using the exclusive grounding terminal (When
the grounding terminal is already built on the house)
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Voltage to ground is lower than 150V
(Including the case where earth leakage breaker is installed)
Perform grounding work 3 .
Perform grounding work 3, if possible, for
your safety .
Exclusive grounding terminal
Must perform the grounding work 3 .
Note 1) Must perform the grounding work 3 .
(Including the case where earth leakage
Note 2)
❋ ❋ When using grounding of the switch board
Voltage to ground is over 150V
Note 1)
breaker is installed)
Distributing board
Note 1)