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Earth, Neutral And Live Board Demonstration
This apparatus is an effective demonstration of how the earth wire and fuse act together to protect both the user and the appliance. When the appliance is connected correctly and the LEDs in the appliance will illuminate to show the appliance is working. A fault is then demonstrated by swapping the live wire from inside the appliance to the case to show either the fuse melts (protecting the user and appliance) or in the case of no earth wire, the LEDs illuminate to indicate the passage of current through the person to ground. The fuse is easily visible and can be seen to ‘blow’ when a fault occurs.The unit is supplied with 10 m of fuse wire and full instructions. A 12 V DC power supply is required. Connections are made via 4 mm shrouded sockets.
SKU: PH50136EEccentricity Of Center Of Gravity انحراف مركز الثقل
In architectural design, it is recommended that spaces for unusually heavy weights be in basements or in buildings isolated from the main structure. Ductile parallel piped with a central plumb line, which enables to demonstrate that the center of gravity of solid passes through its support polygon. It is made by positioning the stiff elements asymmetrically with respect to the center of gravity of the story.
SKU: PH10559
