Without the proper knowledge on how to install a garbage disposal correctly, it can be risky to try the installation. First, check the power. When installing household appliances that use electricity, one must switch off the electricity powering the appliance.
Proof shows that most of times accidents happen not because the appliances have defects, but because the users are careless.
Before starting the installation check out if the wire beneath the sink has some current on it by the use of a tester. If there is some electric current on it, switch off the circuit of the particular room and do the installation. Secondly, always use gloves and goggles. When you open an old garbage disposal, there is a probability that the pipes may get you wet with the filthy water found in them and while working underneath the sink, some water my splash into your eyes. It is therefore advisable to wear gloves and goggles when installing garbage disposal. It is easy to learn the installation of a garbage disposal but it is important to avoid hazards caused by our carelessness.