Kirchhoff current law at a junction is a statement of

1. KCL states that the algebraic sum of currents at any junction is zero. 2. This ensures no accumulation of charge at any node. 3. It is a direct expression of the principle of conservation of electric charge. 4. Conservation of energy underlies the voltage law (KVL) around a loop, not KCL. _Source: syllabus Physics, Ch 3 "Current Electricity", §3 Kirchhoff laws_