DC Cable Runs

[CuriousElectron]

Greetings Gents,
Is there any technical requirement/guidance on providing clamping supports for parallel runs of DC(+/-) cables? My concern is the magnetic forces acting between the pairs of DC cables in parallel runs which would cause them to attract and possible rub against each other. It seems that if the cables are clamped to a supporting structure, that would prevent the movement of the cables due to magnetic forces.
Thoughts?
Thanks,
EE

 

[waross]

Why the concern about DC forces. For the same RNS current, the peak forces in an AC cable will be twice the forces for the same current DC.
My code (Canadian Electrical Code) specifies methods and spacing of cable clamps and/or supports but does not differentiate between AC anf DC.

Bill
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Ohm's law
Not just a good idea;
It's the LAW!