Ground fault is simply a short in the system. It occurs when current going out on ungrounded phase comes back on grounded path. To avoid shock hazards, current going out any one phase must come back on another phase or neutral. Ground Fault Protection A ground fault protection device is required to protect from […]
Circuit Breaker Tester: Clamping Ammeter Circuit breakers that trip every time they’re reset may be overloaded. In order to diagnose a circuit breaker overload you can test the circuit breaker by using a clamping ammeter. You can use this circuit breaker tester to check overloads and shorts that are in progress. They determine whether the […]
How to Replace a Circuit Breaker Typically circuit breakers will not need to be replaced. Unlike a fuse, a circuit breaker is designed to reset. On occasion a circuit breaker may break or malfunction resulting in the need replace it with a new breaker. Most residential homes have a main circuit breaker and separate branch […]
Let’s talk about the most common circuit breaker problems people have Circuit Breaker Troubleshooting: Miswiring Circuit Breaker: Electrical Load How to Reset a Tripped Circuit Breaker Tripped Circuit Breaker: Circuit Overload Tripped Circuit Breaker: Short Circuit Why Does the Circuit Breaker Trip While Operating Certain Appliances Why is My Circuit Breaker Box Humming Circuit Breaker […]
Replacing an existing circuit breaker? Simply look at the label. Typically, the part number is displayed on the primary label of the breaker, usually by the manufacturer logo. Look for one of the following markings: Part Number or P/N Catalog Number or Cat # Mfr Part Number or MPN In most cases other markings like […]
What is mounting hardware? In order to mount molded case circuit breakers into most panelboards a hardware kit, sometimes known as a “link kit” or “finger kit”, is required. The hardware kit makes the electrical connection between the circuit breaker and the vertical bus. Most hardware kits include everything that is needed to mount the […]
“Square D tandem breaker won’t fit” Sound familiar? What is it about tandem / twin breakers that confuse so many of us? Maybe if they gave these bad boys a more specific part number then it wouldn’t be so bad, right? The thing is, although many Square D QO tandems have the same part number, […]
Reading Time: 3 minutes Hey there Contractors and fellow Service Professionals! Today we are covering the last item of the PLC series, the Allen Bradley 2711P-RDT10C Series B PLC. This is a 10.4 inch display module with touchscreen and 18-bit color graphics. Allen Bradley 2711P-RDT10C Standard Processor Module This standard display module is a replacement […]
Reading Time: 2 minutes Hey there Contractors and fellow Service Professionals! Today we are covering the Allen Bradley 1785-L80B Series E PLC. This is a PLC 5/80 Controller with 100K words SRAM user memory. Allen Bradley 1785-L80B Standard Processor Module This programmable controller is another central part of each control system based on the […]
Reading Time: 2 minutes Hey there Contractors and fellow Service Professionals! Today we are covering the Allen Bradley 1785-L40E Series E PLC. This is an EtherNet/IP Controller with 48K words SRAM user memory. Allen Bradley 1785-L40E EtherNet Controller The Ethernet controller embedded TCP/IP communication capabilities allow to communicate with other Ethernet PLC 5 […]
