Electrical Safety - Sunbeam EM6910 Service Technician – Training Manual

ELECTRICAL TEST FOR EARTHED (CLASS I) APPLIANCES
Earth Continuity
♦
Insulation Resistance
♦
Electric Strength
♦
insulation.
EM6910 Café Series Espresso Machine

ELECTRICAL SAFETY

Earth continuity test must be performed between exposed metal
parts, and any one of the following locations:
(a) The earth pin on the three-pin plug attached to the flexible
cord (or complete assemblies).
(b) The green/yellow earth wire of the flexible cord (where no
plug is fitted).
(c) The main earth terminal on the body of the appliance
(where no plug and cord is fitted).
Method
When a minimum current of 25 amperes from an extra low
voltage supply (0-12V AC) is made to flow between the above
locations, the resistance as determined by the volt amp method
(ie. V/I) must be less than 0.1 ohm for stationary parts and less
than 1 ohm for moving parts (e.g. shafts, etc.).
measurement is from location (a) or (b) an allowance for the
resistance of the cord is permitted.
A resistance measurement is to be taken between earth parts
(earth pin) and live parts (active and neutral pin) using 500 volts
dc. The resistance obtained must not be less than 1 Mega ohm.
A high voltage test must be applied between earthed metal parts
(earth pin) and live parts (active and neutral pins connected
together) of 1500 volts rms for 1 second or 1250 volts rms for
one minute for Quality Audits (QA).
Repeat clause 6.1.2 to verify there was no breakdown of
Issue: A
When the
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