Skip to content


Distribution Design Catalogue (DDC)

The Distribution Design Catalogue (DDC) contains the approved standard equipment arrangements for the design of our underground and overhead distribution networks within the SWIS.

The DDC does not encompass construction standards and should be read in conjunction with our relevant design and construction publications.


Need to speak to someone?

We're here to help. Call us on 13 10 87 (7am-5pm Monday to Friday) or email your enquiry to