DIY or Hire a Contractor
This is the first thing you have to consider. Are you confident of installing your appliance on your own? Some appliances like ceiling lights require correct wiring. If you do not know how to connect wires correctly then you should not do it yourself. Any type of electrical wiring and installation involves risk of electrocution. If you are not careful then it can result in injury or even death. If you are going to do it yourself then make sure someone is present nearby and knows what to do if you suffer electric shock. Installation of appliances like washing machine and dishwasher may require plumbing works. Are you ready for the laborious process of breaking a part of wall to install the pipe for waste water removal? A company that specialises in this type of installation will do everything for you. At the same time, the service will cost you money. The advantage of hiring a professional contractor is that your work is completed quickly and according to the appliance manufacturer's installation guidelines. You do not have to leave your work and there is no risk of injury. Works completed by professionals have finishing and look good. They avoid damaging anything during the installation process.
When installing a new device, you should know the power requirement guideline. Some appliances run at very high voltage and can be connected only to high ampere electrical receptacle. For example, even a powerful vacuum cleaner such as the dyson dc54 animal cinetic cylinder vacuum cleaner will need less energy than an appliance such as a washing machine. If you already have lots of power guzzling appliances at home then consult an electrician before installing another power hungry appliance. If you run all such appliances at the same time then your home electricity system may not be able to withstand the demand. You may have to first apply for higher power system from your electricity supply company. If you are going to run a device that runs on DC electricity then you will need an AC to DC converter. Read the manual of your device to see what type of power converter is needed. Sensitive electronic devices benefit from a surge protector.
If you live in a rented house then you will need permission from the homeowner before you can install an appliance that requires breaking the wall or tinkering with electrical system. If you own the home then you may need permission from your local council for installing a device that has to be installed outside the home. Such devices include solar panels, small wind turbines for electricity generation, large dish antenna, and large electricity generator. You will need permission from the local council if the installation work of an appliance involves structural works. Such works include home structure alteration and connection of home waste water pipe to city sewerage system.
All home appliances are manufactured according to strict safety guidelines however, you should always keep a good fire extinguisher at home. Make sure someone is at home if you are going to install something on your own. In case of an accident, the person can help you immediately.