N
Neutral link, closed
A removable link in the neutral conductor shown in its closed position, allowing the neutral to be opened for testing.
IEC
IEEE / ANSI · N
ANSI/IEEE Neutral link, closed form
IEEE-library form of neutral link, closed: a removable link in the neutral conductor shown in its closed position, allowing the neutral to be opened for testing.
In plain English
What does ANSI/IEEE Neutral link, closed form mean?
This reference locates neutral link, closed in Autodesk's IEEE-oriented fuses family. A neutral link is a bolted or plug-in link in the neutral conductor, often mounted in a fuse carrier style holder alongside phase fuses. It allows the neutral of a circuit to be disconnected for insulation testing or fault finding without disturbing other circuits on the neutral bar. The closed form shows its normal service state. The public library uses HFU1NLC for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
A simple example
Use the surrounding circuit labels and the project legend to identify the intended operating condition and connection. Carry the same device reference into the schedule or equipment document so the symbol can be reconciled with its real terminals, function and operating limits.
What the drawings help you do
The symbol is not a switch and the link should not be opened under load. It does not provide overcurrent protection; the fuse-like holder can mislead readers into treating it as a neutral fuse. Rules on whether the neutral may be separately disconnected differ between earthing schemes. Do not read the holder as a fuse. A closed neutral link is a removable connection; a neutral fuse would be a protective device and is generally not permitted. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
This particular reference
IEEE-library form of neutral link, closed: a removable link in the neutral conductor shown in its closed position, allowing the neutral to be opened for testing. A closed neutral link is a removable connection; a neutral fuse would be a protective device and is generally not permitted.
- Phase
- One of the related AC waveforms in a power system.
- Terminal
- An identified point where a conductor connects.
- Rating
- A value stating the conditions for which equipment is specified.
Read the source: Autodesk IEEE Symbol Preview — Fuses · Definition of standardised earthing schemes
IEEE / ANSI · Neutral Link - Closed
Autodesk IEEE Symbol Preview: Fuses, block HFU1NLC. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · N
What it represents
This reference locates neutral link, closed in Autodesk's IEEE-oriented fuses family. A neutral link is a bolted or plug-in link in the neutral conductor, often mounted in a fuse carrier style holder alongside phase fuses. It allows the neutral of a circuit to be disconnected for insulation testing or fault finding without disturbing other circuits on the neutral bar. The closed form shows its normal service state. The public library uses HFU1NLC for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
Use the surrounding circuit labels and the project legend to identify the intended operating condition and connection. Carry the same device reference into the schedule or equipment document so the symbol can be reconciled with its real terminals, function and operating limits.
The symbol is not a switch and the link should not be opened under load. It does not provide overcurrent protection; the fuse-like holder can mislead readers into treating it as a neutral fuse. Rules on whether the neutral may be separately disconnected differ between earthing schemes. Do not read the holder as a fuse. A closed neutral link is a removable connection; a neutral fuse would be a protective device and is generally not permitted. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
How to read it
- Do not read the holder as a fuse.
- Confirm the link is opened only with the circuit isolated.
Information to show or reference
- Label the link with its circuit number.
- Show it in its normal closed state.
- Check scheme rules for neutral disconnection.
A distinction that matters
A closed neutral link is a removable connection; a neutral fuse would be a protective device and is generally not permitted.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — Fuses
Public IEEE-oriented Fuses table explicitly lists HFU1NLC as Neutral Link - Closed. This supports the vendor convention context, not reproduction of the publisher graphic.
Definition of standardised earthing schemes
Public installation-guide definitions of the neutral's role in earthing schemes.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
Explore related references
N
Neutral link, open
A neutral link drawn removed or open, showing the neutral conductor disconnected at that point.
IEC
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Neutral conductor mark
A mark on a single-line conductor group identifying which conductor is the neutral, often drawn as a small circle on a stroke.
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Fuse
An overcurrent protective element that interrupts a circuit by melting its fuse link.
SLD / Schematic
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