SEATTLE — Law enforcement officials still don’t have suspects or a motive for break-ins that badly damaged four Pierce County electrical substations on Christmas Day and left hundreds of customers without power Monday afternoon. Nor are police ready to say whether the incidents were coordinated or connected to a recent string of similar incidents at substations in the Pacific Northwest and on the East Coast. “People want to associate (Sunday’s incidents) with whatever’s going on in North Carolina and Oregon and Southern Washington,” said Sgt. Darren Moss, a Pierce County Sheriff’s Department s…