If a 14-2 cable is run from the panel to the outlet, then a 15 amp circuit breaker is the largest that can be used to protect that circuit. If a 12-2 cable is run from the panel to the outlet, then a 20 amp circuit breaker is the largest that can be installed to protect the circuit. Support cable.
Types Of Keyboard. There are two major types of computer keyboards: Basic and Extended. The Basic keyboard contains 104 keys and is enough to perform all the functions that can be done on a Windows PC. The Extended keyboard may have additional keys and the design varies among the companies manufacturing them.
Number of Keys. The standard number of keys on an acoustic piano is 88. Most manufacturers design keyboards with 88 keys, although you will find keyboards with less keys that are designed for portability. In general, 88-key digital pianos are considered better than those with fewer keys.