CSP Day 46 · Electrical Safety & NFPA 70E

本课目标 | Learning objectives

5 题至少答对 4 题，并说清每题依据
把错题归为「词不懂 / 问句读错 / 依据不足」三类之一
说出本块学到的三条可迁移结论

Get at least 4 of 5 right and justify each

Sort each miss into wording, question stem, or evidence

State three transferable takeaways from this block

上传个人图片（可选）/ Add a photo (optional)

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五题复盘 | Five-question recap

选出答案并提交，查看解析与依据。/ Pick an answer, submit, and read the rationale.

1. NFPA 70E 对「带电作业」的默认立场是？

NFPA 70E's default stance on energized work is?

A. 鼓励带电作业以节省工期 Encourage live work to save schedule B. 断电作业为默认，带电为许可下的例外 De-energized work is the default; energized is a permitted exception C. 由班组长现场决定 Leave it to the crew leader on site D. 电压低于 480 V 无需遵守 Below 480 V the standard does not apply

2. 弧光边界处的入射能量是多少？

What incident energy defines the arc flash boundary?

A. 4 cal/cm² B. 8 cal/cm² C. 1.2 cal/cm² D. 40 cal/cm²

3. 有限接近边界的尺寸取决于？

The limited approach boundary is sized by?

A. 入射能量 Incident energy B. 电压与部件类型（查表） Voltage and part type, from a table C. 作业人数 Number of workers D. 柜体颜色 Enclosure colour

4. PPE 类别 3 的额定值是？

What is the rating of PPE Category 3?

A. 8 cal/cm² B. 12 cal/cm² C. 25 cal/cm² D. 40 cal/cm²

5. 「断电」的完整定义是？

The complete definition of de-energized is?

A. 开关在 OFF 位 The switch is in the OFF position B. 隔离 + 上锁挂牌 + 仪器验证零电压 Isolation + lockout/tagout + meter verification of zero voltage C. 指示灯熄灭 The indicator lamp is out D. 保险丝拔出 The fuse is pulled

错因归类 | Sort your misses

把两条边界混为一谈 → 做题先问「这道题防的是电击还是烧伤」Confusing the two boundaries → for each question, ask first 'does it guard against shock or burns'
用电压猜 PPE 类别 → 类别只读标签能量，标签 ≤ 额定Guessing the PPE category from voltage → read the category from label energy only; label ≤ rated
把「开关关了」当断电 → 回看六步：隔离、上锁、验证Treating 'the switch is off' as de-energized → revisit the six steps: isolate, lock, verify

接下来学什么：下一块（Day 47–51）回到机械能量：机械防护挡住释放点，进阶 LOTO 处理多能量源、残余能量与群体作业——上一块「验证零电压」的原则会在机械世界放大成「验证零能量」。
Next block (Days 47–51) returns to mechanical energy: guarding blocks the release point, and advanced LOTO handles multiple sources, stored energy and group work — 'verify zero voltage' becomes 'verify zero energy'.

学习打卡与笔记 | Progress & notes

完成 BCSP 官方自测并记录结果 / Complete the BCSP self-assessment 建立公式表与英文术语表 / Create the formula sheet and glossary 完成情景题与两道巩固题 / Complete the scenario and both review prompts 通读蓝图 PDF 的领域与权重 / Read the blueprint domains and weights

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.

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