The following is being proposed for preliminary review and comment only:
1. For Preliminary Review Only: This Proposed Tri-National Standard for Fire Pump Controllers covers controllers intended for starting and stopping centrifugal and positive displacement fire pumps, including automatic and non-automatic types for electric motor or engine driven pumps in accordance with NFPA 20, Stationary Pumps for Fire Protection. Types of controllers covered include diesel engine, electric motor, limited service, high voltage and residential. Controllers may be suitable for use as service equipment. This proposed tri-national edition of UL 218 is fundamentally the current UL 218 standard with the addition of national differences for Canada and Mexico and also includes the following significant changes: a) Clarification of the scope to allow a combination of a controller/automatic transfer switch; b) Addition of definitions; c) Separation of requirements for motor starting into full and reduced voltage types; d) Clarification of requirements for short circuit testing; e) Inclusion of requirements for: pressure switch/transducer tests, locked rotor overcurrent protection test, barrier dielectric strength test, temperature test, dielectric voltage withstand test, and coated printed circuit board performance tests; f) Change in classification of controllers for foam concentrate pump motors to controllers for electric motor driven additive pumps; g) Deletion of the reference to stand-alone upstream automatic transfer switch; h) Addition of requirements for Metallic pressure sensing lines and fittings; i) Replacement of the term "Cabinet" with "enclosure"; j) Revised 6.14.5 and addition of 6.14.7 to clarify that the standard allows a non-interlocked isolating switch and circuit breaker; k) Deletion of "Stand alone" in 7.11.5 pertaining to meters; l) Clarification of marking for upstream protection; m) Addition of requirements covering Locked Rotor Overcurrent protection; n) Addition of requirements for variable speed fire pump controllers; o) Revision of 16.19 to specify 225% instead of 300% for maximum capacity of generator or second utility; p) Replacement of Table 2 into two Tables, 2 and 2A, for three phase ratings and for single phase ratings and revision of kilowatt ratings; q) Addition of references to Annex A for UL 347 and IEEE 4.