Dav industries manufactures a 3-phase, 3-wire-screw type test terminal block. This terminal block is connected with ammeters, watt meter, maximum demand indicators, tri-vector meters, maximum demand indicators. Purpose of the terminal block: this enables site testing to be done without interrupting load circuit. With the test terminal block, any connection can be made easily and quickly to check load current and supply voltage. Description of the terminal block made by the dav industries: the test block and the top cover are made of black bakelite molding. The molded barriers are provided in between adjacent terminals to give complete protection against flash over. The cover is secured in place by knurled sealing units. A connection diagram is pasted inside the cover. All terminals shorting links and screws are of brass and nickel plated to prevent corrosion. Each terminal has a 5 mm hole for cable entry.