Could you please advise which article should be used in the below sentence?

I and my friend are doing an exercise of filling suitable article(s) (a / an / the / no article) into the blank of the sentence:

You should disconnect ____ power before attempting to repair electrical equipment.

Both of us agree that indefinite articles 'a' and 'an' will not be used before uncountable nouns like power in the above sentence. However, we have different views on the other choices.

For me, I don't use any article because

When we refer to general ideas, plurals or uncountable nouns we do not use THE.
Source: Grammar.cl

and I also showed my friend some example sentences from Google:

This starts in the home, where you should disconnect power before performing any work like replacing a light fixture or an outlet.
Source: powerlines.seattle.gov

My friend disagrees with me. She explains that without definite article "the", the sentence in the exercise means you should disconnect all power, even the power from equipment which you don't repair. This doesn't make sense. That's why she thinks "the" should be filled into the blank to mean that you should disconnect the power which is relevant to the electrical equipment you want to repair. Fortunately, she found the original sentence from Cambridge dictionary:

You should disconnect the power before attempting to repair electrical equipment.
Source: dictionary.cambridge.org

  • 2
    Your friend is "over-rationalising". Idiomatically, we include the article in turn off the power (same as turn on the light, put out the trash). But it's really just a matter of what's become idiomatically established. This leads eventually to the current situation, where if we don't hear the article in contexts where we'd normally expect it, we cast about for any "same but different" meaning that might be intended. But in contexts like A generator provides [the] power for lighting in our isolated farmhouse, it's purely a stylistic choice, with no strong idiomatic preference. Feb 3, 2017 at 16:15
  • 1
    I agree: this is a stylistic choice. You can use the definite or zero article; neither version sounds awkward to me.
    – J.R.
    Apr 11, 2018 at 9:41

1 Answer 1


Cambridge is correct. The definite article is used to indicate a known entity -- in other words, the reader should know which power is meant. This is not a "general idea" -- this is a recognizable instance of something that exists in the real world.

The meaning of "the power" depends on context. If you are working on an entire house, then you should disconnect power to the entire house. If you are working on a specific area of the house, disconnect the power to that area. If you are working on a specific device, disconnect the power to that device.

In other words, there should be no risk of you touching live wires while you work.

Of course there is some ambiguity here, but you're expected to interpret using common sense. If you're just replacing a power socket, you don't knock out power to your entire neighborhood.

  • Is there any difference if I add the definite article in the example sentence from powerlines.seattle.gov? (This starts in the home, where you should disconnect [the] power before performing any work like replacing a light fixture or an outlet?)
    – doquan0
    Feb 3, 2017 at 17:23
  • 2
    There is no difference between the two. In technical documents, lists of instructions, media headlines, and various others, many articles and prepositions are routinely removed. This may be called the "frozen" style of writing, as it's fairly formal and direct, e.g. "Tighten screws until firmly seated."
    – Andrew
    Feb 3, 2017 at 17:55

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