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safety fuse

C1
UK/ˈseɪfti fjuːz/US/ˈseɪfti fjuːz/

Technical (electrical/engineering), specialized (mining/demolition), occasional metaphorical use.

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Definition

Meaning

A safety device in electrical systems, consisting of a piece of wire that melts and breaks the circuit if the current exceeds a safe level.

In explosives, a cord or tube filled with slow-burning material used to transmit fire to a detonator or explosive charge at a safe distance and speed. Can also refer metaphorically to a person or situation that temporarily prevents a dangerous escalation.

Linguistics

Semantic Notes

The term is polysemous. The electrical meaning is far more common in general discourse. The explosives meaning is domain-specific. The metaphorical use is rare and typically requires contextual clarification.

Dialectal Variation

British vs American Usage

Differences

No significant lexical differences. Spelling: 'fuse' (US) / 'fuse' (UK) – both spell the noun the same way. The verb is 'fuse' (US) and 'fuse' (UK), though UK also accepts 'fuse'.

Connotations

Identical technical connotations. The metaphorical use is equally rare in both varieties.

Frequency

Equally common in technical contexts in both regions. The electrical meaning is universally understood.

Vocabulary

Collocations

strong
blow a safety fusereplace a safety fusetripped the safety fuseelectrical safety fusecircuit safety fuse
medium
check the safety fuseblown safety fuserated safety fusemains safety fuseplug safety fuse
weak
old safety fusesmall safety fusestandard safety fusemain safety fusefaulty safety fuse

Grammar

Valency Patterns

The [NOUN] blew the safety fuse.Install a [ADJ] safety fuse in the [NOUN].The safety fuse [VERB] to prevent a fire.

Vocabulary

Synonyms

Strong

fuse (in electrical context, 'fuse' is often used as shorthand for 'safety fuse')

Neutral

circuit breaker (for function, not device)cut-outovercurrent protection device

Weak

safety deviceprotective device

Vocabulary

Antonyms

hazardlive wireunprotected circuit

Phrases

Idioms & Phrases

  • “blow a fuse (idiom for losing one's temper, related but not identical)”
  • “on a short fuse (idiom for being quick to anger)”

Usage

Context Usage

Business

Rare. Might appear in procurement lists for electrical components or health & safety manuals.

Academic

Common in engineering, physics, and materials science texts discussing electrical safety or explosive engineering.

Everyday

Common when discussing household electrical problems (e.g., 'The lights went out; I think a safety fuse has blown.').

Technical

The primary register. Precise specifications (amperage, type, response time) are critical in technical documentation.

Examples

By Part of Speech

verb

British English

  • The surge caused the circuit to fuse.
  • The metals were fused together under heat.

American English

  • The overload fused the safety mechanism.
  • The artist fused glass and metal in the sculpture.

adverb

British English

  • Not applicable for 'fuse' as an adverb.

American English

  • Not applicable for 'fuse' as an adverb.

adjective

British English

  • The fuse wire is a standard component.
  • We need a fuse box upgrade.

American English

  • The fuse element is intact.
  • Check the fuse panel in the basement.

Examples

By CEFR Level

A2
  • The lamp is not working. Maybe the safety fuse is broken.
  • The man changed the safety fuse in the plug.
B1
  • If you overload the socket, it will blow the safety fuse.
  • Always switch off the power before replacing a safety fuse.
B2
  • The antiquated wiring lacked adequate safety fuses, posing a significant fire risk.
  • Demolition experts carefully measured the length of the safety fuse to ensure a controlled explosion.
C1
  • The device incorporates a fail-safe mechanism whereby a precisely calibrated safety fuse severs the primary circuit milliseconds before critical temperature thresholds are reached.
  • In his diplomatic role, he acted as a political safety fuse, absorbing tensions between the factions to prevent an immediate confrontation.

Learning

Memory Aids

Mnemonic

Think of a SAFETY GUARD for electricity. The FUSE is the part that SACRIFICES itself (melts) to keep you SAFE.

Conceptual Metaphor

A SACRIFICIAL LAMB / A DELAY MECHANISM. The fuse is a component that intentionally fails to save the whole system. In explosives, it's a DELAYED TIMER for safety.

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Avoid translating as 'безопасный предохранитель' which is a tautology. In Russian, 'предохранитель' already implies safety. Use just 'предохранитель' for the electrical device and 'запал' or 'огнепроводный шнур' for the explosive meaning.

Common Mistakes

  • Confusing 'safety fuse' (noun) with 'to fuse' (verb).
  • Using 'safety fuse' to refer to a circuit breaker (a different, resettable device).
  • Misspelling as 'safety fuze' (an alternative, chiefly US military, spelling for the explosive type).

Practice

Quiz

Fill in the gap
After the power surge, we had to replace the blown in the consumer unit.
Multiple Choice

In an explosives context, what is the primary function of a safety fuse?

FAQ

Frequently Asked Questions

No. Both are overcurrent protection devices, but a safety fuse is a one-time-use device that must be replaced after it 'blows'. A circuit breaker is a resettable switch that can be turned back on.

No. You must use a fuse with the identical current rating (e.g., 13 amp, 3 amp) and physical type. Using an incorrect fuse can be a serious fire hazard or cause equipment damage.

It comes from the Latin 'fusus' meaning 'spindle', referring to the shape of early fuses (cords soaked in combustible material). The electrical term was adopted later due to the similar 'melting' function of the wire.

No, it's quite rare and literary. Phrases like 'acting as a safety fuse' would likely need explanation in everyday conversation. The idiom 'blow a fuse' (get angry) is far more common.