Heating tests
Voltage
Current regulators
Electric regulators
Ratings
Oil-immersed transformers
Alternating-current transformers
Arc-welding equipment
Electric welding
Gas tungsten-arc welding
Marking
Transformers
Symbols
Rectifiers
Metal-arc welding
Type testing
High-voltage tests
Power transformers
Electrical equipment
Welding equipment
Temperature-rise limit
Testing conditions