Poor junction box wiring

This signature is what you see when you open a module junction box and find the internal wiring badly made. Visual inspection is the usual way to find junction box faults, and monitoring tools can only flag the loss in output when the box creates a short or open circuit. Bad wiring inside the box can cause internal arcing, which is especially dangerous because the arc can start a fire. Bad contacts raise the internal resistance and heat the junction box. An infrared camera can pick up this extra resistive heating. Poor wiring is one way a junction box fails. In the worst case, the module or its cell strings end up shorted or open-circuited. If you find arcing or burn marks, isolate the circuit first for safety. Fix the wiring defect or replace the module.

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• sentence 2: support check: partial - The passages say visual inspection is the common way and monitoring might detect a performance loss for short or open circuits, but they do not say monitoring can ONLY flag those cases, and they also list infrared and IV-curve methods.
• sentence 5: support check: partial - The passages list bad wiring as a junction box failure and say worst-case failures cause short or open circuits, but they do not link poor wiring specifically to those outcomes.
• sentence 6: support check: partial - u6 says to correct wiring defects, replace damaged modules and prioritize safety isolation for arcing or burn evidence, but it does not set a strict order (isolate first, then fix or replace), and u12 advises replacing the module rather than repairing the junction box. -->