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        Switch Voltage
        
            
            
    
        
            
        
        Open and Closed Case
        
            
            
    
        
            
        
        Bi-metal & Magnetic Switches – Short #252
        
            
            
                                                            
                                    
                            
                        
                        
                    
                
                
                     
    
#switches
Tech Tips:
        
            On an energized, intact circuit, you will read voltage across an OPEN switch when testing with a voltmeter. However, you probably won't read significant voltage across a CLOSED switch. Both sides of a closed switch are electrically identical (or at least very close). Therefore, there should be no movement of electrons between the leads of […]        
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            I know I'm gonna get some eye-rolling here, but it needs to be said. When we teach electricity to new techs, we use a lot of “water” metaphors. We talk about volts like PSI, amps like flow, and watts like GPM (speaking of GPM in HVAC, check out our article on hydronics HERE). Even the […]        
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    Podcasts:
        
             In this short podcast episode, Bryan covers some basics on bi-metal and magnetic switches. Bi-metal switches are made of two dissimilar metals that are bonded together and are often integrated into motors. When the temperature changes, the metals bend. In an overload circuit, they're designed to bend and open the circuit in an overheat […]        
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