Most junction boxes or enclosures carrying basic termination and electrical protection equipment will require cable entries to be made (cable glands fitted if the unit is to be exposed to adverse environmental conditions), DIN rail or bus bar and internal equipment to be mounted. This alone can take between 20 minutes and two hours, depending on the size and complexity of the unit. The additional cost of having an enclosure supplied complete and ready to fit can often equate to no more than a few minutes of fitting time, especially in projects that require multiple boxes requiring the same layout and components. As soon as additional machining operations or fitting and testing of basic components are required on-site, then the savings become exponential.Spelsberg UK is currently offering a complete assembly service that includes the supply of enclosures, drilled, milled, fitted with cable entries and glands, and populated with any number of component items. In a real world example of these savings in action Spelsberg UK supplied a national mobile phone company with junction boxes ready fitted with busbar, circuit breakers, terminals and cable glands. The units were fitted to out-door power supplies used on network masts. The savings made in reduced supplier base, administration, logistics, production and fitting time reduced the overall cost of the circuit protection element in the project by around £1/2 million.