The National Electrical Code (NEC) specifies that listed and labeled equipment, such as a range, should only be installed per the manufacturer’s instructions (NEC 110.3(B)). So you must wire it according to whatever the manufacturer’s installation manual allows. If you no longer have the manual, most older manuals are still available as a pdf document online at the manufacturer’s website. 

    Not all manufacturers allow hard-wiring for their range but, if they do, there are two additional things you need to take care of:

1. The wire splice should be in a junction box, with flexible conduit protecting the NM-cable between the box and the range.
2. Since someone servicing the range can no longer simply unplug it to be sure that the power is disconnected, you need to install a lockout device at the breaker for the range in the electric panel.

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Here’s links to a collection of our other blog posts about ELECTRICAL WIRING:

• Which house appliances need a dedicated electrical circuit?

• Can a short circuit cause a high electric bill?

• What is the maximum spacing requirement for securing NM-cable (nonmetallic-sheathed cable)?

• Is it alright to just put wire nuts on the end of unused or abandoned NM-cable or wiring?

• What causes copper wires to turn green or black in an electric panel?  

• What are typical aluminum service entrance wire/cable sizes for the electrical service to a house?

• Why is it unsafe to bond neutral and ground wiring at subpanels?

• Should I get a lightning rod system to protect my house?

• Why is a strain relief clamp necessary for the cord connection to some electric appliances?  

• Why are old electrical components not always "grandfathered" as acceptable by home inspectors?

    Visit our ELECTRICAL and APPLIANCES pages for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.