# Question #bba22

Oct 20, 2016

You can use the heater plus 13 bulbs but this is too close to the limit for practical uses. It would be safer to set the limit at 10 A which is the heater plus 2 bulbs.

#### Explanation:

The equation for power is:

$P = I E$

where I is the current (in Amperes) and E is the voltage (in Volts).

$P = \left(15 A\right) \left(220 V\right)$

$P = 3300 W$

This is the heater plus 13 bulbs but this is too close to the limit for practical uses.