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EASA AR100-2020 Recommended Practice - Rev. August 2020 Appendix, Page 1

Appendix
Electrical Testing Safety Considerations

(This Appendix is not a part of EASA AR100-2020, Recommended Practice for the Repair of Rotating Electrical Apparatus.)

A.1 PERSONAL SAFETY out of the test area.
A.1.1 Training A.2.4 Lighting
Employees should be trained and qualified in safe Test areas should be well illuminated.
operation of all electrical equipment within their re- A.2.5 Safety Equipment
sponsibility. Training should be provided by use of
relevant equipment operational manuals, hands-on Fire extinguishers and first aid equipment should
be readily available and personnel should be trained
training and other multi-media methods. Employees
in their use.
should be informed of the relevant safety rules, and
employers should enforce compliance. A.2.6 Test Unit Clearance
Clearance should be provided between the unit
A.1.2 Personal Protective Equipment
under test and the test area boundaries to allow ease
(PPE)
of movement for personnel. Lead length should allow
Personal protective equipment (PPE) should be
suitable for the work to be performed. Arc-rated ma- a minimum of ten feet (3 meters) between test center
terial is recommended. Exposed jewelry should not operator and the unit under test. Exposed shafts and
be worn. Safety glasses and safety shoes, and hearing couplings/sheaves should be guarded.
protection if necessary, should be worn at all times. A.3 UNIT UNDER TEST
When working on or near energized electrical con- A.3.1 Suitability For Test
ductors or circuit parts, personnel should adhere to Test personnel should verify that the unit is me-
safe work practices as outlined in NFPA 70E, Standard chanically and electrically suitable to undergo the
for Electrical Safety in the Workplace.
proposed test procedures.
A.1.3 Supervision
A.3.2 Exclusive Attention
Employees should work under the direction of an
Only the unit under test should be in the test area.
experienced and qualified person within the test area.
At least two qualified persons should be within the A.3.3 Grounding (Earthing)
test area at all times. An equipment ground (earth) should be installed
A.1.4 First Aid And CPR on all apparatus under test.
Personnel should be trained in the procedures for A.3.4 Base
first aid, cardiopulmonary resuscitation (CPR), and Units under test should be secured to prevent roll-
securing emergency medical aid. ing or tipping during testing.
A.2 TEST AREA A.4 TEST PANELS
A.2.1 Enclosure A.4.1 Construction
The test area should be enclosed with a fence or Construction should be of the “dead front” type.
other physical barricade. Red or yellow strobe lights Instantaneous over-current trips or fuses should
may be placed at test corner areas for additional limit fault currents in the main power supply to the
warning. panel capacity.
A.2.2 Gates A.4.2 Voltages
When a metallic fence or cage is used, it should Output voltages should be clearly marked. Voltages
be grounded (earthed). Gates provided for entry of above 600V should require special selection proce-
equipment and personnel should be equipped with dures to prevent inadvertent application.
interlocks so power to test area is interrupted if gate A.4.3 Warning Lights
is opened.
A warning light should indicate when the panel
A.2.3 Signs is energized. An additional warning light should
Signs should be posted concerning the electrical indicate when power leads to a unit under test are
hazards, warning unauthorized personnel to stay energized.

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