RMS-LB 2018 with 12/20 Revisions

All Systems (Revised 12/20) 36 ANSI/AARST RMS-LB 2018 (with 1220 revisions) Radon Mitigation Standards for Schools and Large Buildings c) Battery operated components shall not be used unless they are equipped with a low-power warning feature; d) Components that require electricity for indication of system failure shall be on non-switched circuits and designed to reset automatically when power is restored after power supply interruptions; and e) Components that require electricity for indication of system failure shall not be powered by the same branch circuit as the mitigation system fan(s). Exception: Where the monitoring system has an independent means, such as a battery backup system, that actively alerts occupants or other individuals of component failure or branch circuit deactivation. Note —Section 8.3 is NOT part of the 12/20 revision updates. Until updates are complete, the following previously published provisions remain in effect. 8.3 Electrical The electrical service for ASD Fans shall comply with the following provisions in addition to all other electrical code requirements. 11 8.3.1 Disconnect required For ASD fans, a means of electrical disconnect shall be provided for in the line of sight and within 6 feet (1.8 m) of the mitigation system fan(s). Exception: A switch remote from the fan location shall be permitted when concerns sufficiently warrant preventing inadvertent deactivation of the fan. 8.3.2 Labels required (disconnects) Labeling shall comply with Section 8.4.5. 8.3.3 Protection from shock All outdoor wiring for ASD fans shall be protected in conduit, unless otherwise permitted by local code, and shall not be a plug disconnect. 8.3.4 Not allowed Wiring shall not be located in or chased through the ASD duct piping . 8.3.5 Collateral mitigation Informative— Collateral mitigation is where a system may intentionally or inadvertently extend influence to multiple areas within a shared building. When a shared building has commercial units , dwellings , classrooms or other areas that are divided by walls or partitions for separate and distinct occupancy uses, occupants or tenants, the following additional considerations are required: 8.3.5.1 Inadvertent Collateral Mitigation Note—See Section 10.4 for notifications required in OM&M plans when mitigation is not conducted in all attached units or dwellings in a shared building. These are situations where the effects of collateral mitigation are inadvertent and it is beyond the control of the contractor to coordinate design features and monitor mitigation system effects in adjoining units, dwellings or other potentially affected areas within a shared building. 8.3.5.2 Intentional Collateral Mitigation (electrical) When a single mitigation system is intentionally designed to satisfy mitigation needs in more than one unit, dwelling or area within a shared building, power provided to the system shall be from a source that is electrically metered independent from individual units unless the meter is common to all units or dwellings . 11 As required by local statutes. For further information, see the National Electric Code® (NEC) as published by the National Fire Protection Association (NFPA).