13.8kV Crossing Cables

Not with correct clearance, refer to your local regulations.

dear,

IE rules states that crossing of cables , there must be a minimum clearance of at least 1.2 mtrs. in depth, & mechanically seperated by RCC tiles.

This is for safety, but, heat dissipation derating is appplied when they run parallel.

refer manufacturer's catalog for derating factor.

Hi Harry,

i think, but not sure, that 1.2m is not required for shielded XLPE insulated cables such as our case here. Am I right?

I would like to know where or under which clause a difference in depth of 1.2 m.is mentioned in IE rules , as it could not be established by the Electrical inspector what vertical seperation is to be maintained in two 11kv cables crossing each other.

I am afraid that your answer is mis-guiding! As far as my knowledge goes, none of the 143 IE Rules talk anywhere about cable laying clearances. If you are authentic, please quote the Rule No.

The replies give adequate information.When you say crossing it will be better to ensure Xing at 90Deg if possible .How are laying the cable underground? any brick or cement cover is provided.Check local reulations.

thanks guys.

I really appreciate your valuable inputs.

ok, i would like to visualize and share with you one of these situations.

cables A&B are new cables. it is planned to make 2 points of jointing with cable C.

Obviously, cable C will be cut and spliced with these two new cables. in this case, cables A&B will cross cable D.

By the way, in local regulations, no clearances, guidances or precautions mentioned to be considered!!