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TRUSTED BY MARKHAM, IL HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon657
    Verified electrical services reviews

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Cris Electric
4.9(
40
)
Electrical Wiring or Panel Upgrade

Serving Markham, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"Very professional and has great customer skills. He really knows his job , and what he is doing.. I highly recommend him for any type of electrical work that you may need.,, and he is also a great trouble shooter/problem solver , when it comes to electrical. Work."
Response time2 hrs
Response rate96%
2 neighbors recently requested a quote
Avatar for Integrated Systems Technology
Integrated Systems Technology
4.4(
107
)
Ceiling Fan - InstallCeiling Fan - RepairElectrical Switches, Outlets & Fixtures - Install or Repair+3 more

Serving Markham, IL and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Istalled light switch; 2 electrical outlets and troubleshoot and fix bad existing outlet and lights. Quality work performed to my satisfaction. They diplayed a high level of knowledge and experience for the work in which they performed. They showed up on time, explained what was needed and cleaned up after themselves. And the cost is very reasonable."
Recommended by89%of homeowners
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Electrical questions, answered by experts

The size of your home will help determine the size of your electrical panel. Usually, the decision comes down to a 100-amp electrical panel versus a 200-amp panel. Smaller homes, especially those without an HVAC system, may be able to get by with a 100-amp panel. 

If you have a larger home or need to power AC, a 200-amp panel should be the best fit. It’s unlikely that you’ll need a larger panel than that unless you have a larger home or unique electrical needs, but an electrician can help you make the final call.

Call your utility company immediately. Do not go outside, even in your own yard, and keep pets indoors. Downed power lines pose a serious electrocution hazard. They can also cause large power surges that could damage your appliances, so it’s a good idea to shut down power to your home if possible. If your breakers trip, leave them off until the utility company finishes its repair work.

The key difference between a circuit breaker versus a surge protector is that circuit breakers shield your entire electrical system from overcurrents and faults, while surge protectors defend your electronic devices against voltage surges and spikes. A circuit breaker interrupts the flow of electricity in a circuit when it detects an overload or short circuit, protecting the wiring from damage and preventing fires. In contrast, a surge protector shields electronic devices from voltage spikes, such as those caused by lightning strikes or power surges, preventing damage to the device’s inner mechanics.

When converting a standard 120-volt outlet to a 240-volt outlet, the only components you can typically reuse are the existing electrical box and the hole in the wall. Everything else—including the wiring, breaker, and receptacle—should be replaced to ensure both safety and efficiency. Appliances designed for 240 volts have different plug configurations that won’t fit into a standard 120-volt outlet, making it necessary to install a compatible 240-volt receptacle. This design helps prevent overloading or underloading the power available to any one outlet or circuit.

It is safe to run a generator continuously, but you must follow safety protocols to ensure personal and home safety. Read the manufacturer’s instructions for specific recommendations, but the general recommendation is to turn generators off overnight or when you’re away from the house. Overworked generators can pose a fire hazard and if your generator is not in a well-ventilated area, running it continuously could lead to carbon monoxide poisoning.

The Markham, IL homeowners’ guide to electrical services

From average costs to expert advice, get all the answers you need to get your job done.