ADOPTS WITH AMENDMENTS:

International Residential Code 2015 (IRC 2015)

Part I — Administrative

Part II — Definitions

Part III — Building Planning and Construction

Part IV — Energy Conservation

Part V — Mechanical

Part VI — Fuel Gas

Part VII — Plumbing

Part VIII — Electrical

Part IX — Referenced Standards

Heads up: There are no amended sections in this chapter.
(Adopted as modified herein)

Section U101 Scope

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U101.1 General

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Section U102 General Definitions

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Section U103 Solar-Ready Zone

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U103.1 General

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U103.2 Construction Document Requirements for Solar Ready Zone

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U103.3 Solar-Ready Zone Area

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U103.4 Obstructions

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U103.5 Roof Load Documentation

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U103.6 Interconnection Pathway

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U103.7 Electrical Service Reserved Space

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U103.8 Construction Documentation Certificate

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Section AU101 (RB101) Scope

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AU101.1 (RB101.1) General

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These provisions shall be applicable for new construction, except additions.

Section AU102 (RB102) General Definitions

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SOLAR-READY ZONE. A section or sections of the roof or building overhang designated and reserved for the future installation of a solar photovoltaic or solar thermal system.

Section AU103 (RB103) Solar-Ready Zone

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AU103.1 (RB103.1) General

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New detached one- and two-family dwellings, and multiple single-family dwellings (townhouses) with not less than 600 ft2 (55.74 m2) of roof area oriented between 110° and 270° of true north shall comply with sections AU103.2 through AU103.8 (RB103.2 through RB103.8).

EXCEPTIONS:
  1. New residential buildings with a permanently installed on-site renewable energy system.
  2. A building with a solar-ready zone that is shaded for more than 70% of daylight hours annually.
  3. Buildings and structures as designed and shown in construction documents that do not meet the conditions for a solar-ready zone area.

AU103.2 (RB103.2) Construction Document Requirements for Solar Ready Zone

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Construction documents shall indicate the solar ready zone where applicable.

AU103.3 (RB103.3) Solar-Ready Zone Area

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The total solar-ready zone area shall consist of an area not less than 300 ft2 (27.87 m2) exclusive of mandatory access or set back areas as required by 527 CMR. New multiple single-family dwellings (townhouses) three stories or less in height above grade plane and with a total floor area less than or equal to 2,000 ft2 (185.8 m2) per dwelling shall have a solar-ready zone area of not less than 150 ft2 (13.94 m2). The solar-ready zone shall be composed of areas not less than five feet (1,524 mm) in width and not less than 80 ft2 (7.44 m2) exclusive of access or set back areas as required by 527 CMR.

AU103.4 (RB103.4) Obstructions

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Solar-ready zones shall consist of an area free from obstructions, including but not limited to vents, chimneys, and roof-mounted equipment.

NOTE: Nothing in AU103.4 (RB103.4) shall require any construction documents to be redesigned or reconfigured so as to create a solar-ready zone area.

AU103.5 (RB103.5) Roof Load Documentation

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The structural design loads for roof dead load and roof live load shall be clearly indicated on the construction documents.

AU103.6 (RB103.6) Interconnection Pathway

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Construction documents shall indicate pathways for routing of conduit or plumbing from the solar-ready zone to the electrical service panel or service hot water system.

AU103.7 (RB103.7) Electrical Service Reserved Space

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The main electrical service panel shall have a reserved space to allow installation of a dual pole circuit breaker for future solar electric installation and shall be labeled "For Future Solar Electric." The reserved space shall be positioned at the opposite (load) end from the input feeder location or main circuit location.

AU103.8 (RB103.8) Construction Documentation Certificate

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A permanent certificate, indicating the solar-ready zone and other requirements of this section, shall be posted near the electrical distribution panel, water heater or other conspicuous location by the builder or registered design professional.
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