basics of electrical

potential difference

Charge moving in an electric circuit gives rise to a current, Naturally, it must take some work, or energy, for the charge to move between two points in a circuit, say, from point a to point b. The total work per unit charge associated with the motion of charge between two points is called voltage. …

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what is residual current

No commentary on protective devices would be complete without reference to residual current devices. The IEE Regulations specify that, provided the required disconnection times can be met for circuits and all bonding is in place, fuses and/or CBs will provide the necessary protection against electric shock. RCDs are only required • when disconnection times cannot …

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