Outline three LEE regulations regarding cable runs. (3 marks)craft1 electrical June/July 2020

The IEE (Institution of Electrical Engineers) is a professional organization that sets standards and guidelines for electrical engineering practice in the UK. Here are three IEE regulations regarding cable runs:

1. Maximum voltage drop: The IEE Wiring Regulations (BS 7671) specify a maximum allowable voltage drop for different types of cables and applications. This is to ensure that the voltage at the load is sufficient to operate the equipment and to prevent losses in efficiency due to excessive voltage drop.
2. Cable tray fill: The IEE Wiring Regulations specify a maximum fill ratio for cable trays, which is the ratio of the total cross-sectional area of the cables in the tray to the cross-sectional area of the tray itself. This is to ensure that the cables have sufficient space to dissipate heat and to prevent overheating and damage to the cables.
3. Cable bending radius: The IEE Wiring Regulations specify minimum bending radii for different types of cables, which is the minimum radius that a cable can be bent without damaging the insulation or causing undue stress on the conductor. This is to ensure that the cables are installed safely and will not fail due to improper bending.