ME 140L - Electrical Safety

ME 140L - Electrical Safety - turning the circuit off...

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ELECTRICAL SAFETY Electricity can kill you, if you don’t follow some basic rules when handling electrical circuits. Extracted from BASIC RULES: ± READ carefully any user’s guide provided and LISTEN carefully the TA instructions before starting any lab. NEVER hurry when handling electricity. ± REMOVE anything metallic (watch, chains, pencils, etc) when working on exposed wires. ± ALWAYS check the proper settings of the power supply and/or digital multimeter (DMM) before using it. (DC, AC, etc) ± CHECK that the power supply is turned off BEFORE wiring it to the circuit. If you detect any anomaly disconnect the power supply immediately. ± Some of the elements used in the circuits are able to store electrical energy. ALWAYS wait about 5 time constants (5R/L for an RL circuit and 5RC for an RC circuit) after
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Unformatted text preview: turning the circuit off before handling the components. After testing a circuit, ALWAYS turn the power source off before checking your connections. Your hands MUST be dry when working with electrical circuits. So should be the table you are working on. All voltages ABOVE 50 Volts DC or 30 Volts AC (RMS) have a potential hazard. The danger increases if your hands are not completely dry or you have a cut. ALWAYS consider a circuit energized unless proven otherwise. NEVER leave your circuit unattended when working. If you have to leave for a while, turn if off. References: [1] Robbins & Miller. Circuit Analysis Theory and Practice. [2] MIT Electrical Safety Manual....
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