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  2. T5 retrofit conversion - Wikipedia

    en.wikipedia.org/wiki/T5_retrofit_conversion

    T5 retrofit conversion can maintain existing lighting levels with the higher efficiency of the T5 lamp. However, with kits that operates the lamp on the existing magnetic ballast, the efficiency drops and the lamp life is considerably shortened, as T5 lamps aren't designed to be operated on mains frequency but only on high frequency.

  3. Ring circuit - Wikipedia

    en.wikipedia.org/wiki/Ring_circuit

    Because the breaker rating is much higher than that of any one socket outlet, the system can only be used with fused plugs or fused appliance outlets. They are generally wired with 2.5 mm 2 cable and protected by a 30 A fuse , an older 30 A circuit breaker , or a European harmonised 32 A circuit breaker.

  4. Retrofitting - Wikipedia

    en.wikipedia.org/wiki/Retrofitting

    A refurbishment or retrofit is defined as: "any work to a building over and above maintenance to change its capacity, function or performance' in other words, any intervention to adjust, reuse, or upgrade a building to suit new conditions or requirements". [1] Refurbishment can be done to a part of a building, an entire building, or a campus. [2]

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    mail.aol.com

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  6. NEMA connector - Wikipedia

    en.wikipedia.org/wiki/NEMA_connector

    The 5-20R receptacle has a T-shaped neutral hole, to accept both 5-15P and 5-20P plugs. An acceptable alternative version of the 5-20R receptacle has a rectangular slot that will only accept 5-20P plugs. The 5-30 and 5-50 are physically larger, with 1 in (25.4 mm) between power pins; 5-30 also has an L-shaped neutral blade. [17]

  7. Glow switch starter - Wikipedia

    en.wikipedia.org/wiki/Glow_switch_starter

    Once the tube strikes, the impinging main discharge keeps the cathodes hot, permitting continued electron emission without the need for the filaments to continue to be heated. The starter switch does not switch on again because the resistance in the tube drops and the voltage across the starter is insufficient to start a glow discharge again. [2]