- emitter electrode
- enclosure
- end cap
- end shield
- energized electrode
- energy saving
- energy storage
- equivalent
- erection
- erection time
- erratic current
- error test
- estimated cost
- evacuate
- equivalent conductance
- equivalent generator
- erecting yard
- escalator
- etched circuit
- excess current
- exchange
- excitation
- excitation current
- exciting circuit
- exciting field
- European standard
- evanescent field
- event report
- excitation anode
- excitation system
- excitation voltage
- exciting dynamo
- exciting voltage
- expanded plastic
- exit light
- explosion protection
- expulsion gap
- extension cable
- external insulation
- external voltage
- extra current
- expulsion fuse
- extrinsic conduction
- extrinsic photoconductivity
- external overvoltage
- extinction potential
- exchanged heat
- excitation power
- exhaust
- exogenous electrification
- face-up
- facsimile transmission
- fade in
- fanning strip
- Faraday disk
- faradmeter
- F layer
- fabric filter
- factory automation
- fade out
- fahnstock clip
- failure rate
- expenditure
- expense account
- exponential curve
- exposure
- extruded insulation
- expert
- exploring coil
- explosion pot
- exposed wiring
- exposure meter
- external resistor
- extreme pressure
- extrinsic conductivity
- fact
- fading
- false closure
- false switching
- fanned cable
- Faraday disc
- fast thermocouple
- fast wave
- fault
- fault clearance
- fault condition
- fault current
- fault detection
- fault detector
- fault finding
- fault identification
- fault impedance
- fault location
- fault resistance
- fault tracing
- faulted area
- faulty insulation
- faulty phase
- faure plate
- feasibility condition