View source for EMC implementation - Busway

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'''Busways reduce the risk of exposure to electromagnetic fields.'''

[[File:Fig R14a.jpg|none]]
'''''Fig. R14a:''''' <i>Power cables and metallic busways magnetic field radiations</i> 

According to the WHO (World Health Organisation), exposure to electromagnetic fields can be a health hazard starting at levels as low as 0.2 micro-Teslas and could represent a long-term risk of cancer. Some countries have created standards that stipulate limits (e.g. 0.2 µT at 1 metre in Sweden).

All electrical conductors generate magnetic fields proportional to the distance between them. The design of busbar trunking with tightly spaced conductors in a metal enclosure helps to considerably reduce radiated electromagnetic fields.

The electromagnetic field characteristics of busbar trunking are welldefined and measurements show that they are far below potentially dangerous levels (see&nbsp;'''Fig.&nbsp;R14b''').

In specific cases, where particularly low values are required (computer rooms, medical rooms, some offi ces), it is important to minimize the magnetic induction generated by power cables.

Magnetic induction is:
*proportional to the current
*proportional to the distance between the conductors
*inversely proportional to the square of the distance with respect to the busbar.

Busbar with a steel casing provides a good screening effect compared to power cables: magnetic field reduced from 2 to 30 times, depending on the Canalis model.

This is particularly low because of the short distance between the bars and the additional attenuation provided by the steel casing.

[[File:Fig R14b.jpg|none]]
'''''Fig. R14b:''''' <i>Canalis busbar trunking system data</i> 


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