来自 昏昏睡睡HSE · From Drowsy HSE CSP DAILY LEARNING · DAY 44

电气安全与 NFPA 70E · 术语精讲 | Electrical Safety & NFPA 70E · Glossary Focus

第 8 块 · Domain 1 · 安全原理高级应用 · 25%Block 8 · Domain 1 · Advanced Application of Safety Principles · 25%第 3 / 5 课 · 术语精讲Lesson 3 of 5 · Glossary Focus

本课只做一件事：把「电气安全与 NFPA 70E」的 6 个高频英文术语从「眼熟」变成「能用」：定义、易混、例句。

Turn the six high-frequency terms of Electrical Safety & NFPA 70E from familiar to usable: definition, look-alike, example.

本课不涉及：不扩到别的板块的术语，也不考题型技巧。
Not covered here: No terms from other blocks, no question-technique work.

本课目标 | Learning objectives

  1. 为每个术语说出定义，而不是只给中文对应词
  2. 指出每一对易混词差在哪一个限定条件上
  3. 把每个术语放进一句真实的现场英文里

  • Define each term rather than translate it
  • Point to the exact qualifier that separates each look-alike pair
  • Put each term into one real site sentence

    • 图片预览 / Photo preview

    图片经过压缩后保存在当前浏览器。导出失败时，可在下方预览图片上长按保存。/ The photo is compressed and stored in this browser. If download fails, long-press the preview below to save it.

    术语详解 | Glossary in depth

    Qualified Person / 有资格人员
    接受过设备与危害培训、能识别带电部分并判定其电压距离、具备自我保护能力并被雇主认可的人。
    Someone trained on the equipment and hazards, able to identify exposed energised parts and their clearances, protect themselves, and recognised by the employer.
    易混 / Easily confused：与 unqualified person 不同：后者可进入有限接近边界之外的区域，但须有人监护与警告。
    Not an unqualified person: the unqualified may approach up to the limited approach boundary under escort and warning.
    例句 / In a sentence：Only qualified persons work inside the enclosure. / 只有有资格人员进入柜内作业。
    Limited Approach Boundary / 有限接近边界
    防电击的接近限值，按电压与是否为裸露固定部件查表确定，未授权者不得跨越。
    The shock-protection approach limit set by voltage and part type from a table; unqualified persons may not cross.
    易混 / Easily confused：与弧光边界不同：这条按「电压」查表，弧光边界按「能量」计算。
    Not the arc flash boundary: this one is tabled by voltage, the arc boundary computed from energy.
    例句 / In a sentence：The barrier marks the limited approach boundary. / 隔离栏标出了有限接近边界。
    Arc Flash Boundary / 弧光边界
    边界处的入射能量等于 1.2 cal/cm²（可致二度烧伤），由计算或表确定；进入须穿对应类别 PPE。
    The distance where incident energy equals 1.2 cal/cm² (onset of a second-degree burn), from calculation or tables; entry requires matching PPE.
    易混 / Easily confused：与有限接近边界无固定关系：可能更远也可能更近，必须分开看。
    No fixed relation to the shock boundary: it may lie nearer or farther — treat them separately.
    例句 / In a sentence：The arc flash boundary extends beyond the work bench. / 弧光边界超出了工作台。
    Incident Energy / 入射能量
    弧光在某距离单位面积上释放的能量，单位 cal/cm²；随距离增大而下降。
    Arc energy per unit area at a given distance, in cal/cm²; it falls as distance increases.
    易混 / Easily confused：与 ATP（弧热防护值）不同：入射能量是「现场有多少」，ATP 是「PPE 能挡多少」，选择原则是现场 ≤ 装备。
    Not ATP: incident energy is what the site delivers, ATP is what the PPE withstands; the rule is site ≤ gear.
    例句 / In a sentence：The label lists incident energy at 18 inches. / 标签给出了 18 英寸处的入射能量。
    Energized Work Permit / 带电作业许可
    允许带电作业的书面许可，须写明理由（断电危害更大或不可行）、风险分析、边界与 PPE，由授权人签发。
    Written authorization for live work stating why de-energizing is a greater hazard or infeasible, the risk analysis, boundaries and PPE, signed by an authorized person.
    易混 / Easily confused：与工作票/作业许可（general permit）不同：70E 许可必须包含「为什么不能断电」这一条。
    Not a generic work permit: the 70E permit must answer 'why not de-energize'.
    例句 / In a sentence：The permit justified live diagnostics on the VFD. / 许可说明了变频器带电诊断的理由。
    Verification of De-energization / 断电验证
    用与电压等级匹配、且现场先验证过功能的仪器证实所有导体对地与相间为零电压。
    Proving zero voltage phase-to-phase and phase-to-ground with a meter rated for the voltage and proven functional on site.
    易混 / Easily confused：与「看见开关断开」不同：验证是测量动作，不是观察动作。
    Not 'the switch is off': verification is a measurement, not an observation.
    例句 / In a sentence：Test the meter before and after the absence-of-voltage check. / 验零前后都要先试仪器。

    情景自测 | Scenario check

    本课理解Lesson comprehension

    这道题考什么：考「验证」的完整性：仪器先验证，再验现场。
    Tests verification completeness: prove the meter, then prove the circuit.

    验证零电压的正确流程是哪一项？

    Which is the correct sequence for verifying absence of voltage?

    自编练习题，不是 BCSP 官方真题，也不能用来预测分数。 / Original practice item, not an official BCSP exam question.

    动手练 | Practice

    1. 把 Limited Approach Boundary 与 Arc Flash Boundary 做成一张两行对照表：防什么伤、依据什么、谁可进入。
    Build a two-row table for the limited approach and arc flash boundaries: harm, basis, who may cross.

    2. 写一句你会贴在配电间门上的提醒，要求含两个数字。
    Write one door-side reminder for an electrical room that includes two numbers.

    学习打卡与笔记 | Progress & notes

    已完成 0/4 项 / 0/4 tasks complete

    连续学习 / Learning streak: 0 天 / 0 days

    进度保存在当前浏览器，不会自动跨设备同步。/ Progress is stored in this browser only.

    PNG 学习记录预览；可长按图片保存 / PNG card preview; long-press to save

    可靠来源 | Official references

    BCSP — CSP Examination Blueprint (CSP11)

    BCSP — Official Self-Assessments

    BCSP — Certified Safety Professional (CSP)

    Pearson VUE — CSP 考试预约 / Scheduling

    本课为一般性学习资料，不替代现场专业评估、法规要求或组织程序。/ Educational content only.

    ← 返回课程目录 / Back to catalog