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September 15, 2011

The advantage of Bolt & Spade Joint vs Joint Pack
- MM Powerplus Busway

In the electrical busway market, there are two kinds of jointing methods: the Bolt & Spade Joint and the Multi-Stack Joint Pack system. The Bolt & Spade jointing method is better than the Multi-Stack Joint Pack due to its one contact per phase. For the Multi-Stack Joint Pack, there are 4 contact points per phase in low current rating. Therefore, there will be 16 contact points for a 3P4W busway. As the number of conductor contact points increases, this will result in higher voltage drop and temperature rise. For middle range rating busway where the busway becomes double stack per phase, the number of contact points increases dramatically to 32 and triple to 48 for higher rating where the busway is a triple stack.
    
Furthermore, the conductor contact of the Bolt & Spade Joint is a direct over-lap while the Multi-Stack Joint Pack uses a link bar. The link bar may not provide a good contact for two reasons: (1) the link bar may not be the same material in terms of conductivity as the busway conductor; (2) the contact area may be smaller, creating chances for over-heating.
    
MM Powerplus Busway Limited is a leading manufacturer of electrical busway since 1996. An international company with its manufacturing facility located in Macau, MM Powerplus Busway have since been supplying its single bar per phase electrical busways to most of the local and foreign owned casinos. These casinos operate 7 x 24 and open 365 days a year. Their products are also installed in data centers as well as MTR projects such as: Equinix in Global Gateway, Barclays Bank in Cheung Kong Center, Deutsche Bank in ICC, Singapore Telecom and Singapore MRT. Over the years, besides focusing in Macau, MM Powerplus Busway have been awarded for many icon projects (hotels, shopping malls, high rise commercial and residential developments) from well-known developers in Asia Pacific, India and the Middle East. In addition, MM Powerplus Busway products have been approved by many international M & E consultants such as: Parsons Brinckerhoff, JRP, Meinhardt, Ove Arup, DSCO, WSP and Maunsell/AECOM.

MM's Bolt & Spade Joint Multi-Stack Joint Pack System

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Contact MM Powerplus Busway Limited
Website www.mmpowerplus.com
Email sales@mmpowerplus.com

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