"arc flash" meaning in English

{
  "forms": [
    {
      "form": "arc flashes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "arc flash (countable and uncountable, plural arc flashes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
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          "parents": [],
          "source": "w"
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          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Electrical engineering",
          "orig": "en:Electrical engineering",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "The extremely intense light and heat produced by a high-energy electric arc."
      ],
      "id": "en-arc_flash-en-noun-GnAnvgVP",
      "links": [
        [
          "electrical engineering",
          "electrical engineering"
        ],
        [
          "extremely",
          "extremely"
        ],
        [
          "intense",
          "intense"
        ],
        [
          "light",
          "light"
        ],
        [
          "heat",
          "heat"
        ],
        [
          "high-energy",
          "high-energy"
        ],
        [
          "electric arc",
          "electric arc"
        ]
      ],
      "raw_glosses": [
        "(electrical engineering) The extremely intense light and heat produced by a high-energy electric arc."
      ],
      "related": [
        {
          "word": "arc blast"
        },
        {
          "word": "arc fault"
        }
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "business",
        "electrical",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "lang_code": "cmn",
          "roman": "diànhúguāng",
          "sense": "Translations",
          "word": "電弧光 /电弧光"
        }
      ]
    }
  ],
  "word": "arc flash"
}

{
  "forms": [
    {
      "form": "arc flashes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "arc flash (countable and uncountable, plural arc flashes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "arc blast"
    },
    {
      "word": "arc fault"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Mandarin translations",
        "Translation table header lacks gloss",
        "en:Electrical engineering"
      ],
      "glosses": [
        "The extremely intense light and heat produced by a high-energy electric arc."
      ],
      "links": [
        [
          "electrical engineering",
          "electrical engineering"
        ],
        [
          "extremely",
          "extremely"
        ],
        [
          "intense",
          "intense"
        ],
        [
          "light",
          "light"
        ],
        [
          "heat",
          "heat"
        ],
        [
          "high-energy",
          "high-energy"
        ],
        [
          "electric arc",
          "electric arc"
        ]
      ],
      "raw_glosses": [
        "(electrical engineering) The extremely intense light and heat produced by a high-energy electric arc."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "topics": [
        "business",
        "electrical",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "lang_code": "cmn",
      "roman": "diànhúguāng",
      "sense": "Translations",
      "word": "電弧光 /电弧光"
    }
  ],
  "word": "arc flash"
}