- drainaway
- draw tongs
- drift compensation
- drilling
- drilling rope
- drive battery
- drive end
- driving belt
- driving piston
- drop
- drop voltage
- dropping resistor
- dry contact
- dry electrolyte
- dry test
- Drysdale potentiometer
- duel voltage
- drawing instrument
- driving potential
- driving torque
- drop-in
- dropout ratio
- dropper
- drum
- drum controller
- drum type
- dry ash
- duplex receptacle
- duralumin
- duration
- dust
- dust precipitator
- duty
- duty regulation
- dynamic braking
- dynamic characteristics
- dubling
- duplex cable
- duplex winding
- duplicate busbar
- dust collector
- dynamic speaker
- dynamometer relay
- dynatron
- dynode
- E bend
- E cell
- E core
- E plane
- early failure
- earth cable
- earth current
- earth electrode
- earth lead
- earth leakage
- earth line
- earth potential
- earth resistance
- earth return
- earth shield
- earth system
- Earth terminal
- earth termination
- earth testing
- earth wire
- earth-free
- earthed
- earthed neutral
- earthed switch
- earthed system
- earthing
- earthing inductor
- earthing position
- earthing switch
- earthing transformer
- Edison cell
- Einthoven galvanometer
- electret
- electric bill
- electric consumption
- electric eye
- electric hysteresis
- electric ignition
- electric lighter
- electric machine
- electric moment
- electric polarisation
- economizer
- eddy current
- edison battery
- effective ampere
- efficiency
- efficiency test
- efflux
- egg insulator
- electric cable
- electric linkage
- electric locomotive
- electric losses
- electric relay