COUNTY OF PRINCE WILLIAM
5 County Complex Court, Prince William, Virginia 22192-9201
(703) 792-6930 Metro 631-1703 FAX: (703) 792-7054
DEPARTMENT OF
PUBLIC WORKS
Division of
Building Development
BUILDING OFFICIAL INTERPRETATION 2003-07
November 16, 2006
CODE/EDITION:
VIRGINIA UNIFORM STATEWIDE BUILDING CODE/2003
SECTION(S):
National Electrical Code/2002
Article 210-52 Dwelling Unit Receptacle Outlets
QUESTION:
1. Must a “sun room” attached to a dwelling unit comply with the requirements of the NEC, Section
210-52 for the installation of dwelling unit receptacles?
2. What is the definition of a sun room?
3. Must a “three season room” or a “Florida Room” attached to a dwelling unit comply with the
requirements of the NEC, Section 210-52 for the installation of dwelling unit receptacles?
4. If a sun room or similar room or area is constructed only with sliding panels, are dwelling unit
receptacles required?
ANSWER:
1. Yes.
2. A sun room attached to a dwelling unit is an “occupiable space” as defined by the BOCA National
Building Code in which the majority of the exterior walls are constructed of glass material.
3. A “three season room” and a “Florida Room” are equivalent to a sun room as defined above.
Therefore, they must comply with NEC, Section 210-52.
4. NEC, Section 210-52 excludes sliding panels in exterior walls from being used in the
determination that dwelling unit receptacles are required. However, the interior wall of the sun
room or similar room must comply with the requirements for dwelling unit receptacles.
Eric M. Mays, P.E., C.B.O.
Building Official