the "L&T (10K) 63 Ampere 100mA, 4-Pole (FP) Polycarbonate RCCB" is a specific model or series of RCCB manufactured by Larsen & Toubro. It has a maximum current rating of 63 amperes, a sensitivity of 100 milliamperes for detecting ground faults, and four poles for comprehensive protection in three-phase systems. The housing is made of polycarbonate for durability and electrical insulation.

10K: Indicates the breaking capacity of the RCCB, which is 10 kiloamperes (10 kA). This value signifies the maximum fault current the RCCB can safely interrupt under specified conditions.

63 Ampere: Denotes the nominal current rating of the RCCB, which is 63 amperes. This rating indicates the maximum continuous current that the RCCB can handle without tripping.

100mA: Indicates the sensitivity of the RCCB, which is 100 milliamperes. This sensitivity allows the RCCB to detect leakage currents as low as 100 milliamperes. Detecting such currents is crucial for disconnecting circuits promptly in the event of a ground fault, thereby reducing the risk of electric shock or fire.

4-Pole (FP): Indicates that the RCCB has four poles or circuits. "4-Pole" means it can simultaneously disconnect all live and neutral conductors in a three-phase system, offering comprehensive protection. "FP" stands for "Four Pole."