The firm also confirmed its place on a gas connection deal worth £70m with Fulcrum alongside McNicholas and Turriff which the Enquirer revealed on Monday.
Carillion will operate in joint venture with Eltel Networks on the National Grid contract with work starting in April 2012.
Carillion Chief Executive, John McDonough, said: “The contract for Fulcrum enhances Carillion’s position as one of the largest providers of gas connection services in the UK and our selection as the preferred bidder to deliver overhead line services for the National Grid underlines the strength of Carillion’s offering as a leader in this market sector.”