Why a 400 Amp Service Upgrade Starts Underground
A 400 amp electrical service upgrade starts underground with excavation and trenching to establish a safe, protected pathway for heavy gauge main service conductors. Installing rigid conduit below the frost line ensures long term power reliability, meets local utility burial depth codes, and supports the high electrical demand of modern properties without ground disruption.
Underground Electrical Service Line Installation for Residential Multiplexes
Installing underground electrical lines for a residential multiplex requires precision, strict adherence to safety standards, and specialized trenching techniques. To install two 400 amp underground service lines for a multi family property, electrical contractors dig a deep trench, typically around 50 inches deep depending on site requirements, and embed the heavy duty conduit directly in poured concrete to ensure long term structural protection.