I have used a laser printer for at least four years, often while one or more of my five computers have been in use, and I have never needed to worry about "sag, as you call it. Though I do recommend that the house-hold fuses are of the correct amperage, and that any computer equipment and telephone plugs are plugged into "Surge-protected" electrical (multi) sockets.
Fuses protect against overcurrent (too much current flow), however caused.
To safely and efficiently run electricity to your shed for powering tools and equipment, consider using underground wiring. This method involves burying insulated electrical cables in a trench to protect them from damage. Make sure to follow local building codes and regulations, and consider hiring a professional electrician for installation to ensure safety and compliance.
Anyplace there is a need to protect the electrical wiring from an overload or short in the wiring.
The fuse if not there to protect the equipment. It is there to protect the wiring in the vehicle from overheating and catching on fire.
If you have a short in an appliance or wiring, the fuse will blow to keep a fire from starting in your wiring.
THHN wire is suitable for use in residential and commercial electrical wiring applications, such as powering outlets, switches, and lighting fixtures.
The breaker in the house keeps tripping because it is designed to protect the electrical system from overloading or short circuits, which can be caused by too many appliances running at once or faulty wiring.
To protect wiring or downstream components from over current
To protect the wiring in the event of the motor failing/getting jammed, the wiring doesn't catch fire.
to protect against radio interference
Insulators are used to cover wiring to prevent electricity from leaking out, reduce the risk of electric shocks, and protect the wiring from damage or deterioration. This ensures that the electricity flows correctly and safely within the wiring system.
In a motorcycle wiring harness, a diode is commonly applied in the charging circuit to prevent backflow of current from the battery to the alternator when the engine is off. It can also be used in the lighting circuit to protect against voltage spikes, ensuring that the electrical components are not damaged. Additionally, diodes can be employed in rectifier circuits to convert AC to DC for powering electrical accessories. Proper placement helps maintain the integrity and functionality of the motorcycle's electrical system.