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As such they are not suitable to be used for carrying dangerous voltages (cf. extra-low voltage).
Other applications are short-circuit-proof extra-low voltage transformers for toys or doorbell installations.
(This mounting system is similar to the Keystone wall plate system for extra-low voltage electrical jacks).
Extra-low voltage (ELV), in electricity supply, is one of several means to protect against electrical shock.
Separated or safety extra-low voltage (SELV)
Initially, insulation displacement connections were seen only in extra-low voltage applications, such as telecommunications, networking and signal connections between parts of an electronic or computer system.
A coaxial power connector is a miniature power connector used for attaching extra-low voltage devices such as consumer electronics to external electricity.
Protected extra-low voltage (PELV)
Functional extra-low voltage (FELV)
Cabling for extra-low voltage systems, such as in remote-area power systems (RAPS), is designed to minimise energy losses while maximising safety.
A Class III appliance is designed to be supplied from a separated/safety extra-low voltage (SELV) power source.
A tiny E5 or E5.5 size is used only for extra-low voltages, such as in interior illumination for model buildings, and model vehicles such as model trains.
Although the FELV part of a circuit uses an extra-low voltage, it is not adequately protected from accidental contact with higher voltages in other parts of the circuit.
The term functional extra-low voltage (FELV) describes any other extra-low-voltage circuit that does not fulfill the requirements for an SELV or PELV circuit.
A multifunction tester or MFT is an electronic device used by electricians to test electrical circuits that use the "low" and "extra-low voltages" typically used by consumers in domestic, commercial and agricultural settings.