Wire Away: Mayberry Electric takes on surgery center conversion

Mayberry Electric, Atlanta, performed electrical work for a project that converted a two-story building that previously was a bank into a medical surgery center in Sandy Springs, Ga., just north of Atlanta.

Advanced Urology owns the building. Electrical design was done by engineering firm Shepherd, Harvey and Associates.

The new surgery center contains multiple exam rooms, two operating rooms, pre-op and post-op areas, nurse stations, a conference room, waiting rooms and doctors’ offices.

The first step was gutting the building’s interior, and Mayberry Electric was responsible for electrical demolition, including removing the existing electrical switchgear, electrical panels and feeders to the utility transformer.

“The electrical service was removed and upgraded to a 1,600-amp (A) 208/120-volt service with new switchgear and panels throughout,” said Scott Mowers, Mayberry Electric’s senior project manager.

“We added a natural gas generator and ATS to feed the life safety equipment and critical branch emergency circuits for the surgery areas. New LED lighting was installed throughout, using automatic controls where allowed by the Code. All mechanical equipment was removed and replaced with new systems. Main power supply and floor ducts were installed for a future CT room. To save time, Mayberry prefabricated outlet and switch boxes at the company’s prefab shop.”

Over the course of six and a half months, approximately 5,000 feet of MC cable, 15,000 feet of No. 4 THHN or larger wire for feeders, and 40,000 feet of No. 6 THHN or smaller wire for branch circuits was installed. Total conduit installed was approximately 7,500 feet of various sizes.

“We had a challenge running the conduits for the upgraded 1,600A service from the utility transformer into the building,” Mowers said. “The solution was digging under the building footer, cutting out the concrete slab inside and running the new conduits underground to the switchgear location. The switchgear had a 13-week lead time, which did not fit into the schedule for the completion date for the clinic. So, expedited fees were paid to decrease the lead time to four weeks, which allowed us to energize the building on schedule.”

All patient-care area wiring was installed in accordance with NEC Article 517 using healthcare facility cable and hospital-grade devices. Much of the surgery area was backed up by the life-safety generator system.

Outside, Mayberry Electric furnished and installed 18 sconce lights with up and down lighting to accent the building exterior. Workers furnished parking lot pole lights connected by underground conduit, which they installed by using directional boring to get the conduit from the building to the first light and then from light to light.

Most of the work on the project was done concurrently, Mowers said, although the scheduling permitted the clinic to open earlier than the surgery area to begin seeing patients and generate revenue for the practice.

Mayberry Electric is committed to working safely.

“Personal protective equipment , such as hard hats, safety glasses and gloves, were worn by our personnel at all times throughout the project,” Mowers said. “Our bucket truck was used to install the exterior lighting at the front of the building and a lift was used to install lighting on the rear of the building. Our men used fall harnesses while performing this work.”

Mayberry Electric is one of four electrical contractors in Georgia to be an OSHA partner in 2014 and continued this partnership until OSHA ended the program in 2015.

“We took the time to go through this rigorous certification program because we hold our safety as our highest daily priority,” Mowers said. “We supply each crew with NFPA 70E PPE equipment for arc flash requirements and provide and require the use of eye and hand protection. Our dedication to safety has lowered our insurance costs, which is a savings we can pass on to our customers.”

Mowers credits several factors that contributed to making the project go smoothly.

“I believe, foremost, we anticipated what the general contractor would need from us next as work on the project progressed, and working as a team with other trades to avoid conflicts that would cause rework helped avoid setbacks,” Mowers said.

“The project management team carefully coordinated the procuring and delivery of all required materials—including lighting and switchgear—to the job site on schedule. These things together helped make this project successful. Communication utilizing today’s technology kept our office and field management in sync,” he said.

Mayberry Electric is a best practice commercial electrical contractor serving the greater Atlanta metropolitan area. Services include design-build, construction, service and energy conservation.

About the Author

Jeff Griffin

Freelance Writer

Jeff Griffin, a construction and tools writer from Oklahoma City, can be reached at up-front@cox.net.

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