Too many appliances on one circuit

Seven appliances are switched on one by one on a $15\ \text{A}$ circuit at $220\ \text{V}$. You will make the program find the total current after each one, the first appliance that takes the current over $15\ \text{A}$, and the power still free on the circuit with all but the last one on. Then it draws the currents as bars, with the fuse as a line.

The idea. In parallel the powers add up, and $I = \dfrac{P}{V}$. The circuit can carry at most $P = VI = 220\ \text{V} \times 15\ \text{A}$.

Your tasks.

1. Inside the loop, work out I, the total current after each appliance.
2. Find first_over, the name of the first appliance that takes the current over $15\ \text{A}$.
3. Find spare, the power in watts still free on the circuit with all but the last appliance on.