Power Limit on Mains: Why Does This Happen?

In summary, the power limit on mains refers to the maximum amount of power that can be safely drawn from an electrical outlet or circuit. This limit is in place to prevent overloading of the electrical system, which can lead to damage or failure of equipment, fire hazards, and safety risks. It can be reached due to various factors, such as using high-power devices simultaneously or having an inadequate electrical system. To determine the power limit for a specific location, one can consult the electrical panel or circuit breaker box. To prevent reaching the limit, it is important to be mindful of power demands, distribute the load evenly, and regularly maintain the electrical system. In some cases, upgrading the system with the help of an electrician may also be necessary.
  • #1
Sakha
297
0
Hi.
Sometimes it happens that if you have a lightbulb and something else that is rated high wattage in the same mains outlet (sometimes even on different outlets), and turn the high-wattage appliance, you can see how the lightbulb gets dimmer.
Why does this happens?

Thanks.
 
Engineering news on Phys.org
  • #2
It happens because of voltage drop in the wires/connections. Since no conductor is perfect some voltage is lost when high(er) currents are being carried by said conductors due to their resistance. Ohms law and all...
 

1. What is the power limit on mains?

The power limit on mains refers to the maximum amount of power that can be safely drawn from an electrical outlet or circuit. This is determined by the voltage and current capacity of the mains supply.

2. Why is there a power limit on mains?

The power limit on mains is in place to prevent overloading of the electrical system, which can lead to damage or failure of equipment, fire hazards, and safety risks for individuals using the electricity.

3. What causes the power limit on mains to be reached?

The power limit on mains can be reached due to a variety of factors, such as using multiple high-power devices at the same time, faulty wiring, or an inadequate electrical system for the demands of the appliances and equipment being used.

4. How can I determine the power limit on mains for my home or workspace?

The power limit on mains for a specific location can be determined by consulting the electrical panel or circuit breaker box. The maximum amperage listed on the main breaker or individual circuit breakers will indicate the power limit for that location.

5. What can I do to prevent reaching the power limit on mains?

To prevent reaching the power limit on mains, it is important to be aware of the demands of the electrical devices and appliances being used and to distribute the power load evenly across different circuits. It is also important to regularly inspect and maintain the electrical system to ensure it can safely handle the power demands. If necessary, consulting an electrician for a system upgrade may also be beneficial.

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