Well, Hager have also gotten involved (and their products may well be good), but should I have to choose between just a few multinational giants? (Maybe so for high-tech products, but in simpler fields I'd rather not over-concentrate the capital if I can help it…)
Even Clipsal's standards seem to have slipped a bit in places, though. Lately a number of smaller companies have been popping up too; most of those probably range from "meh" to junk, but I recently found out about one which looks like it might have a shot at decency.
While they can be found at the major Australian sellers like Rexel, with the limited ranges usually available there, I ordered an assortment directly instead: BS‑POD10 ×2 (Basix S twin 10A outlets) and one each of: PR310 (rewireable plug), PFR310 (trailing socket), BHC (B22 battenholder with clip-on cover), CR01 (ceiling rose), LH01 (B22 lampholder), BCA (B22 adapter plug), MNR (red neon mechanism), MNG (green fluorescent version), MJ (miniature junction box with 4 integral terminals), SJ4 (small junction box) and GJ4 (giant junction box) both with 3 single-screw + 1 double-screw connectors included (you can also buy the GJ without terminals), SMS1QF (Quick-Fit surface socket/plug base for 1.5mm² and 2.5mm² TPS cables) and SMS1_1QF (version for 1mm² cable, without mounting points), M25S (25A split switch mechanism) and YM75 (cutout measuring tool with integrated spirit level).
I subsequently got another three BS‑POD10 at the local Blackwoods.
The Magnet Test
In one of their videos, CEO Dean Lucantonio demonstrates how to detect plated steel terminal screws. While it isn't clear how the AC mains would provoke corrosion, it's probably fair enough to judge any observable resultant failure rate as false economy considering how small the screws are in the first place.
(Whether there is an observable failure rate, I can't say.)
Anyhow, with the number of magnets I have I'd be a fool not to repeat the test myself, and here's what I've found so far:
Clipsal: 30 series switch mechanisms and (1)438 trailing sockets have brass screws, current socket outlets and (1)439 (and 418 side-entry) plugs have plated steel screws. (The plug terminal clamps themselves are still brass like the pins.) An older 25 outlet I have to hand does have solid brass screws.
HPM: In 7P trailing sockets, both the screws and clamps are plated steel (only the contacts themselves being phosphor‑bronze). The D5M cordline switch's earth connector had brass screws originally (slotted only, Australian made), steel screws now (combination head, China made?).
Deta/Arlec: Both switch mechanisms and socket outlets have steel screws. Both trailing sockets and plugs (and their cordline switch) have brass screws, though.
Although not named, those familiar with their construction can see that CSG's video includes one of each of those brands in their comparison.
Steel screws in clamp terminals was probably always accepted practice in plugs at least in Australia, observing the 1950s Ring-Grip plug on John Hunter's history page. (EDIT: Maybe not the best example given that I found a near-identical plug where the pins themselves were copper-plated steel.)
Now for the moment of truth, running the magnet over Connected Switchgear's own products:
- BS‑POD10: Pass on the terminal screws; zinc-plated steel screws hold the unit together.
- SMS1QF and SMS1_1QF: No terminal screws to check here, but they're actually held together with stainless-steel screws!
- M25S, MNR and MNG: Pass (only the switch springs are steel)
- BHC, LH01 and CR01: Pass on the terminal screws; the B22 pin springs and assembly screws are steel.
However on a side note, the CR01's large-terminal screws may be a bit short to securely terminate smaller wires (even on 2.5mm² 7-strand their heads can bottom-out); they're M4 by about 6mm long (7mm would be appropriate). This is also the case to a lesser extent in the M25S, even though its terminal screws are actually longer than those of the Clipsal 30MD20 (the problem there is because the M25S's body has flanges under the screw heads; if you're prepared to disassemble the M25S, you could drill the flanges out to solve that problem). - Screw connectors included in SJ4 and GJ4: The website claims that the connectors sold in jars (100 single-screw or 50 double-screw) have brass screws too, but I got suspicious on seeing the photo in which they don't look brassy. The connectors I got in the junction boxes (I guess they're the same, although the giant box is marked 40A but the connectors listed for 35A in the catalog) actually look the part, but their screws still stick to the magnet.
Sorry, Dean. The SJ4 box is actually marked "Wattspot" but the connectors inside are still Connected.
The same goes for the MJ's integral screw terminals. For what it's worth, I used it (without cover) to make the low-voltage connections for earlier load tests (before getting Wago 221 series, here using the larger version for 0.5–6mm² wires), with no overheating even above 30A. - PR310 and PFR310: While no claim is explicitly made regarding these, they actually have more steel than their Clipsal counterparts: Both the screws and clamping plates in the plug are plated steel, and the socket has steel screws (which don't have great-looking heads either) in tunnel terminals.
- BCA: As above, using clamp terminals with both the screws and plates being steel.
General design and build quality
Terminal screws aside, it's also good of CSG to stick with polycarbonate for the cover-plates, rather than the ABS which yellows heavily on many HPM Excel and Clipsal Classic accessories. (Come on, Clipsal – even the Deta knock-off of your C2015D4 manages to use a polycarbonate cover plate!)
The BS‑POD10 looks fair enough, with wiper contacts formed of 0.7mm phosphor‑bronze. (Although since the incoming common active busbar doesn't need to be springy, they could have made it from brass like the terminals – just as Clipsal did in the older 25 outlet I've shown below – for higher conductivity and hence less cross-section necessary for the rating.) Switch mechanisms are little-changed from Clipsal's (the main difference being a concave curve in the rockers, making them somewhat more ergonomic), although the rockers are marked for 16A even with the 10A sockets. The barriers between busbars look satisfactory to me (when the front plate is holding them in flat). It can be easily seen that the basic structure is the same with or without the extra switch option (BS‑POD10X), only part of the plastic molds being swapped out. (Although the back of the extra switch mechanism would appear to obstruct access to the earth terminal screw )
Three screws hold the unit together at the center and bottom corners, with the top edge hooked into place.
Without an extra switch, the only nuisance (apart from the lack of a stripping length guide on the back) is those pegs in front of the terminal screws – I suppose the idea is to stop the screws from falling out in transit, but it obstructs screwdriver access; feel free to cut the pegs down at installation.
The active and earth terminals have about 5.8mm bores (on par with Clipsal's), neutral is a bit smaller at 5.4mm; screws with M5 thread. One of my samples is even missing the chamfered edge on the neutral bore, and another sample has a small crack near the center screw (although such cracks are not uncommon on Clipsal items either). (I swapped the neutral contacts afterwards to make one good unit.) Some factory fingerprints can be seen on the phosphor-bronze parts.
The assembly screws are obviously better-made on the newer sample, while the terminal screws look better (clearer head shape) on the older unit.
My newer units have deep red on marks, older units smaller marks in a lighter orange-red like on Clipsal (the deep red marks also go with stronger springs, at least among these; while those with orangey marks also have noticeable mold machining marks on the rockers).
For what it's worth, the Clipsal outlets have been swapping phosphor‑bronze contacts out for brass in the meantime; while my older 25 outlet has all phosphor‑bronze socket contacts, the latest production have swapped mostly to brass and only the earth contact remains phosphor‑bronze.
(The newer Clipsal/PDL Iconic series outlets have all brass socket contacts, by the way; along with a less durable plastic-flex arrangement closing the shutters.)
As an intermediate example I have a 2025S (shuttered version), where the left active contact is brass but the others were still phosphor‑bronze.
Clearance/creepage between the termination blades of the SMS1QF measures at 2.08mm when set for 1.5mm² cable, and 2.65mm when set for 2.5mm²; this calculates about right given the specified cable dimensions and 0.7mm blade thickness (being part of the same phosphor-bronze piece as the socket contact).
I couldn't get my calipers at the SMS1_1QF, but I calculate 1.665mm given the 1.13mm diameter solid A+N cores and a 7/0.4 earth; if the earth is 1.5mm² (7/0.5) this would increase slightly to 1.815mm, but of course only one can have been designed for (or maybe a compromise between the two, which would make 1.74mm). In my SMS1_1QF the blades are heavily tarnished, not sure if this will still make a good connection.
The faceplate also has a sizeable molding void; although to be fair, voids (although usually smaller) can often be seen in transparent Clipsal 418S plugs.
To be continued…