E2 MultiMeters

Question 1

Category I meters can be used on

Answer 1

Protected electronic equipment
Equipment is not directly connected to the mains
Transient over-voltage is limited to a low level

Question 2

Category II meters can be used on

Answer 2

Single-phase receptacle-connected loads
Outlets located more than 10m from a CAT III source
Outlets located more than 20m from a CAT IV source

Question 3

Category III meters can be used on

Answer 3

Permanently installed loads such as three-phase motors, distribution panels and three-phase outlets
Single-phase commercial lighting
Buses and feeders in industrial plants

Question 4

Category IV meters can be used on

Answer 4

Supply service connections, mains panels and locations where fault current levels can be very high
Overhead lines where high fault currents are present
Service drop form utility pole to building, conductors between meter and electrical panel