Welder 13 amp plug guide for UK workshops
Updated: October 2026
You plug in an inverter, strike an arc and the fuse or breaker trips as the current rises. The safe response is to stop and check the machine, plug and circuit, not to fit a larger fuse. A welder 13 amp plug can support some moderate, intermittent work when the manufacturer allows it, but a 200 A front-panel claim is not 200 A drawn from the wall. Use this guide for the supply question, then return to the [welder comparison](/hub/soldering-and-welding/welder) for process and product differences. Listings and the public electrical guidance were checked on 17 October 2026. A qualifying purchase can earn a commission at no extra cost to you.
You plug in an inverter, strike an arc and the fuse or breaker trips as the current rises. The safe response is to stop and check the machine, plug and circuit, not to fit a larger fuse.
You plug in an inverter, strike an arc and the fuse or breaker trips as the current rises. The safe response is to stop and check the machine, plug and circuit, not to fit a larger fuse. A welder 13 amp plug can support some moderate, intermittent work when the manufacturer allows it, but a 200 A front-panel claim is not 200 A drawn from the wall. Use this guide for the supply question, then return to the welder comparison for process and product differences. Listings and the public electrical guidance were checked on 17 October 2026. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Supply note | Stated output | Process | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Reboot Reboot RBM2100 MAX | 240 V; a review cites 16 A for heavy plate | 210 A stated | Gas MIG, gasless MIG, stick | 9.9 | about £142.12 | View offer |
| Best value |  H HZXVOGEN H HZXVOGEN ARC200 | 13 A intermittent; 16 A full power | 200 A stated | Stick and lift TIG | 8.7 | about £59.99 | View offer |
| Alternative |  HITBOX HITBOX HBM145 | 230 V stated; plug type not stated | 145 A stated | Gasless MIG, stick, lift TIG | 8.7 | about £149.99 | View offer |
On this page
What a 13 A plug is designed to do
The familiar UK plug is made to BS 1363 and contains a replaceable BS 1362 cartridge fuse. Electrical Safety First advises replacing a plug fuse like for like, and 13 A is the highest standard rating for this plug. At nominal 230 V, 13 A corresponds to roughly 3 kW as a simple voltage-times-current ceiling, but that arithmetic is not a promise that every socket, circuit or appliance can sustain a highly variable welding load.
The fuse protects the appliance flex against excessive current. It is not there to maximise welder output, and it does not prove that the appliance itself is suitable for the socket. The rating plate and the manufacturer’s instructions must state an input compatible with the supply. Inspect the flex, the moulded or rewireable plug and the socket for damage, looseness, discolouration or overheating before welding.
Supplier rules of thumb often place household-plug inverter welders around 110–130 A of welding output. Treat that as shopping guidance, not a regulation or guarantee. Machine efficiency, power factor, startup current, process and duty cycle alter the input. Do not buy a machine supplied with a 16 A industrial plug on the assumption that replacing it with a domestic plug solves the mismatch. If you are choosing rather than troubleshooting, the welder buying guide puts the socket check before the amp sticker.
Welding output amps are not wall amps
The welding circuit uses low voltage and high current at the arc, while the mains input is high voltage and much lower current. Electronics and a transformer convert between them, with unavoidable losses. A display reading 120 A at the electrode therefore does not mean 120 A is being drawn through the plug. Conversely, a machine title of 200 A does not show what it takes from the wall at a particular setting.
You need the input-current or input-power data on the rating plate, plus the manufacturer’s supply requirement. The duty cycle matters too. It describes how many minutes in a ten-minute period the machine can weld at a specified current before cooling. None of the twelve amazon.co.uk listings in this comparison provides a complete duty-cycle percentage, so their headline current cannot establish continuous socket demand.
The H HZXVOGEN ARC200 seller gives a useful distinction: intermittent welding is stated for a standard UK 13 A socket, while continuous full-power work calls for a 16 A supply. That wording does not independently verify 200 A output, but it shows why a domestic plug and flat-out continuous running are different claims. One FEIFANKE owner uses roughly 60–80 A and reports tripping the domestic supply above about 110 A. A Reboot reviewer estimated that a low flux-core setting drew about 8 A from the mains, but that is the reviewer’s estimate, not a certified measurement.
If it trips, do not uprate the fuse
A blown plug fuse or a tripped breaker means protection has operated or a fault may be present. Release the electrode safely, switch off and unplug once it is safe to do so. Check the manual, rating plate, plug, lead and socket. If anything smells burnt, feels unusually hot or shows damage, do not keep resetting protection to finish the bead.
Never install a 20 A fuse in a BS 1363 plug. BS 1362 plug fuses stop at 13 A, and an oversized or unsuitable fuse can allow the flex to overheat instead of disconnecting at the intended current. One review in this comparison reports finding a 20 A fuse in the DEKO 135 A plug. If you find the same, stop using the machine in that condition and have the plug and appliance checked by a competent person.
If the machine is confirmed suitable for a 13 A supply, reducing the welding setting and allowing the stated cooling interval may keep demand within its designed intermittent use. That is not a workaround for a damaged machine or a rating plate that requires 16 A. Extension leads add another weakness. Avoid coiled reels under load, undersized flexes, damaged connectors and long runs that create voltage drop and heat. Where an extension is permitted, it must be properly rated, fully unwound and placed where sparks and hot metal cannot damage it.
When a domestic socket is the wrong supply
If the welder is supplied with a 16 A industrial plug or its plate requires a 16 A supply, leave it that way. Do not swap to a 13 A plug simply because the socket is more convenient. A suitable dedicated circuit and protective device are work for a qualified electrician, who can assess cable size, circuit arrangement, fault protection, earthing and the characteristics of the actual machine.
The same applies when a welder persistently trips a breaker despite being used according to its manual. Do not treat a different breaker type as a DIY cure. A soft-start claim also does not make every socket suitable. Soft start may reduce an initial surge, but it does not change the continuous input rating or the heat developed in the plug, flex and circuit. Plugging into a ring final circuit does not reserve its capacity for the welder. Other connected loads still matter.
Stop immediately if the equipment gives an electric shock, produces a bang or flame, or repeatedly trips protection on switch-on. Reviews of the TRQWH in this basket report those symptoms. They indicate a possible fault, not normal high-output behaviour. Isolate the equipment and seek competent assessment rather than trying another fuse or socket. Supply safety is only one part of welding safety. Use the correct helmet, gloves, fire precautions and fume control, and do not weld on a vehicle or structural component without the necessary competence.
Common questions
Can a welder run from a normal UK socket?
Yes, some inverter welders can run at moderate settings from a sound 13 A socket when their rating plate and manufacturer allow it. That does not guarantee maximum output or continuous operation. Check input requirements and duty cycle, and stop if protection trips repeatedly or the plug becomes hot.
Why does my welder trip the fuse or breaker?
Demand may exceed the permitted load at the chosen setting, startup current may operate protection, another load may share the circuit, or the equipment may be faulty. The rating plate and manual are the starting point. A shock, bang, burning smell or switch-on trip requires isolation and competent inspection.
Can I fit a 20 A fuse in a 13 A plug?
No. A BS 1363 plug uses a BS 1362 fuse with 13 A as the maximum standard rating. A larger unsuitable fuse can allow the flex to overheat and presents a fire risk. If a machine arrives with one, stop using it and arrange a competent check.
Is 200 A welding output the same as 200 A from the wall?
No. The inverter converts roughly 230 V mains power into a much lower-voltage, higher-current welding output. Input and output amperes therefore cannot be compared directly. Use the plate’s input-current or power data and supply requirement rather than the marketing number on the title.
When do I need an electrician?
Use an electrician when the machine requires a dedicated 16 A supply, repeatedly trips despite correct use, has an incompatible plug, or shows signs of overheating or damage. Circuit design and breaker changes are not DIY setting adjustments. The cable, earthing and fault protection need assessment together.
Can I use an extension lead?
Only where the welder manufacturer permits it and the extension is correctly rated, undamaged and fully unwound. Long or undersized leads can cause voltage drop and overheating, while a coiled reel traps heat. A suitable fixed socket is preferable for a high, intermittent load.
Does soft start mean any 13 A socket is suitable?
No. Soft start may reduce the initial surge, but it does not override the machine’s continuous input requirement, duty cycle or the circuit’s capacity. Confirm the rating plate, manual and plug specification before use, regardless of the control features named in the listing.
Related pages
Sources
Public UK sources and the amazon.co.uk listings in this set, last checked on 17 October 2026.
- HSE, Controlling the risks from welding (retrieved 17 October 2026)
- HSE, mild steel welding fume bulletin (retrieved 17 October 2026)
- HSE WL3, welding fume control (retrieved 17 October 2026)
- BSI, BS EN IEC 60974-1 arc welding power sources (retrieved 17 October 2026)
- GOV.UK, Electrical Equipment (Safety) Regulations 2016 (retrieved 17 October 2026)
- Jasic, TIG DC versus AC (retrieved 17 October 2026)
- The Welders Warehouse, stick welding amps (retrieved 17 October 2026)
- SIP Weldmate Autoplus 130 A (retrieved 17 October 2026)